fix: make installed wheel self-contained + harden install.sh prereqs

Addresses the review on PR #481.

Self-contained wheel (review point 1): the gateway/infra/orchestrator
images build from a context that must hold bot_bottle/, pyproject.toml,
and the root-level Dockerfiles. Modules previously located these by
walking __file__ to the repo root, so an installed wheel (package in
site-packages, no repo root) passed `doctor` but failed `start`.

- Add bot_bottle/resources.py: build_root() returns the repo root in a
  checkout (unchanged) or a staged copy from the wheel's bundled
  _resources/ otherwise; dockerfile()/nix_netpool_module()/
  netpool_script() derive from it.
- setup.py bundles the root Dockerfiles, nix module, netpool script, and
  pyproject.toml into bot_bottle/_resources/ at build; MANIFEST.in ships
  them in the sdist.
- Route every _REPO_ROOT/_REPO_DIR call site (docker/macos launch, macos
  infra, firecracker infra_vm/infra_artifact/setup, orchestrator
  lifecycle/gateway) through resources. Checkout behavior is unchanged.

install.sh prerequisites (review point 2): check for git when installing
a git+ spec, and — before the pip fallback — that pip is usable and the
interpreter isn't externally managed (PEP 668), pointing at pipx.

Tests: test_resources covers checkout + staged-wheel layouts;
test_wheel_install builds the wheel, installs it into an isolated venv,
and asserts `doctor` runs and build_root() yields a valid context.
Running `start` end-to-end still needs a Docker/KVM host (CI).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.coveragerc

@@ -20,3 +20,9 @@ omit =
     bot_bottle/cli/tui.py
     bot_bottle/cli/init.py
     tests/*
+    # Build-time only: setuptools invokes it out-of-process to build the
+    # wheel/sdist (it's never imported by the running app), so in-process
+    # coverage can't reach it. Its one job — bundling the root resources into
+    # bot_bottle/_resources/ — is exercised end-to-end by test_wheel_install,
+    # which builds and installs a real wheel and checks the result.
+    setup.py

.gitignore

@@ -17,6 +17,9 @@ __pycache__/
 *.py[cod]
 *$py.class
 *.egg-info/
+# setuptools/build_meta output (wheels, sdists, build tree)
+/build/
+/dist/
 .venv/
 venv/
 .pytest_cache/

MANIFEST.in

@@ -0,0 +1,8 @@
+# Root-level build resources copied into bot_bottle/_resources/ at build time
+# (see setup.py). Included in the sdist so `pip install` from an sdist can
+# still bundle them into the wheel.
+include Dockerfile.gateway
+include Dockerfile.orchestrator
+include Dockerfile.orchestrator.fc
+include nix/firecracker-netpool.nix
+include scripts/firecracker-netpool.sh

bot_bottle/backend/docker/gateway.py

@@ -10,9 +10,10 @@ from ...paths import (
     ORCHESTRATOR_AUTH_JWT_ENV,
     host_gateway_ca_dir,
 )
+from ... import resources
 from ...gateway import (
   Gateway, GatewayTransport, GATEWAY_IMAGE, GATEWAY_NAME, GATEWAY_NETWORK,
-  GATEWAY_DOCKERFILE, REPO_ROOT, GATEWAY_LABEL, MITMPROXY_HOME,
+  GATEWAY_DOCKERFILE, GATEWAY_LABEL, MITMPROXY_HOME,
   DEFAULT_CA_TIMEOUT_SECONDS, CA_POLL_SECONDS, GATEWAY_CA_CERT, GatewayError
 )
 
@@ -50,7 +51,9 @@ class DockerGateway(Gateway):
         # `address` / `stop` work on an already-running gateway without it.
         self._orchestrator_url = ""
         self._gateway_token = ""
-        self._build_context = build_context or REPO_ROOT
+        # Resolved lazily in ensure_built() so merely constructing a gateway to
+        # read its CA never stages a build root from an installed wheel.
+        self._build_context = build_context
         self._dockerfile = dockerfile
         # Ports published on the host (0.0.0.0). Used by the Firecracker
         # backend's dev-harness gateway so VMs can reach it via their TAP link;
@@ -72,9 +75,10 @@ class DockerGateway(Gateway):
         forces a full rebuild (parity with `start --no-cache`)."""
         if self._dockerfile is None:
             return
+        context = self._build_context or resources.build_root()
         argv = ["docker", "build", "-t", self.image_ref,
-                "-f", str(self._build_context / self._dockerfile),
+                "-f", str(context / self._dockerfile),
-                str(self._build_context)]
+                str(context)]
         if os.environ.get("BOT_BOTTLE_NO_CACHE"):
             argv.insert(2, "--no-cache")
         proc = run_docker(argv)

bot_bottle/backend/docker/infra.py

@@ -34,6 +34,7 @@ from .orchestrator import (
     ORCHESTRATOR_NETWORK,
 )
 from ...paths import bot_bottle_root
+from ... import resources
 from ...gateway import (
     GATEWAY_IMAGE,
     GATEWAY_NAME,
@@ -50,8 +51,6 @@ from ...orchestrator.lifecycle import (
 # the pair's public identity.
 INFRA_NAME = GATEWAY_NAME  # the container agents attribute against is the gateway
 
-_REPO_ROOT = Path(__file__).resolve().parents[3]
-
 
 class DockerInfraService(InfraService):
     """Composes the per-host control plane + gateway as two containers.
@@ -68,7 +67,7 @@ class DockerInfraService(InfraService):
         control_network: str = ORCHESTRATOR_NETWORK,
         orchestrator_image: str = ORCHESTRATOR_IMAGE,
         gateway_image: str = GATEWAY_IMAGE,
-        repo_root: Path = _REPO_ROOT,
+        repo_root: Path | None = None,
         host_root: Path | None = None,
         orchestrator_name: str = ORCHESTRATOR_NAME,
         orchestrator_label: str = ORCHESTRATOR_LABEL,
@@ -79,7 +78,9 @@ class DockerInfraService(InfraService):
         self.control_network = control_network
         self.orchestrator_image = orchestrator_image
         self.gateway_image = gateway_image
-        self._repo_root = repo_root
+        # Build context / bind-mount source: the repo root in a checkout, a
+        # staged copy from the installed wheel otherwise (bot_bottle.resources).
+        self._repo_root = repo_root if repo_root is not None else resources.build_root()
         self._host_root = host_root or bot_bottle_root()
         self._orchestrator_name = orchestrator_name
         self._orchestrator_label = orchestrator_label

bot_bottle/backend/docker/launch.py

@@ -33,7 +33,6 @@ from __future__ import annotations
 import dataclasses
 import os
 from contextlib import ExitStack, contextmanager
-from pathlib import Path
 from typing import Callable, Generator
 
 from ...agent_provider import runtime_for
@@ -65,10 +64,7 @@ from ...orchestrator.store.config_store import resolve_teardown_timeout
 from .consolidated_launch import launch_consolidated, deprovision_consolidated
 from .infra import INFRA_NAME
 from .gateway import DockerGateway
-
+from ... import resources
-
-# Where the repo root lives, for `docker build` context. Computed once.
-_REPO_DIR = str(Path(__file__).resolve().parent.parent.parent.parent)
 
 
 def build_or_load_images(plan: DockerBottlePlan) -> BottleImages:
@@ -88,7 +84,7 @@ def build_or_load_images(plan: DockerBottlePlan) -> BottleImages:
             )
         info(f"using cached agent image {plan.image!r}")
         return BottleImages(agent=plan.image)
-    docker_mod.build_image(plan.image, _REPO_DIR, dockerfile=plan.dockerfile_path)
+    docker_mod.build_image(plan.image, str(resources.build_root()), dockerfile=plan.dockerfile_path)
     docker_mod.verify_agent_image(
         plan.image, runtime_for(plan.agent_provider_template).smoke_test,
     )

bot_bottle/backend/docker/orchestrator.py

@@ -15,6 +15,7 @@ import time
 from pathlib import Path
 
 from ... import log
+from ... import resources
 from .util import run_docker
 from ...paths import (
     ORCHESTRATOR_TOKEN_ENV,
@@ -55,8 +56,6 @@ _ROOT_IN_CONTAINER = "/bot-bottle-root"
 
 _HEALTH_POLL_SECONDS = 0.25
 
-_REPO_ROOT = Path(__file__).resolve().parents[3]
-
 
 class DockerOrchestrator(Orchestrator):
     """The control plane as a single fixed-name container. `ensure_built` builds
@@ -71,7 +70,7 @@ class DockerOrchestrator(Orchestrator):
         label: str = ORCHESTRATOR_LABEL,
         port: int = DEFAULT_PORT,
         control_network: str = ORCHESTRATOR_NETWORK,
-        repo_root: Path = _REPO_ROOT,
+        repo_root: Path | None = None,
         host_root: Path | None = None,
         dockerfile: str | None = ORCHESTRATOR_DOCKERFILE,
     ) -> None:
@@ -80,7 +79,9 @@ class DockerOrchestrator(Orchestrator):
         self.label = label
         self.port = port
         self.control_network = control_network
-        self._repo_root = repo_root
+        # Build context / bind-mount source: the repo root in a checkout, a
+        # staged copy from the installed wheel otherwise (bot_bottle.resources).
+        self._repo_root = repo_root if repo_root is not None else resources.build_root()
         self._host_root = host_root or bot_bottle_root()
         self._dockerfile = dockerfile
 

bot_bottle/backend/firecracker/infra_artifact.py

@@ -37,6 +37,7 @@ import urllib.error
 import urllib.request
 from pathlib import Path
 
+from ... import resources
 from ...log import die, info
 from . import util
 
@@ -44,8 +45,6 @@ from . import util
 # scheme can't collide with a cached/published artifact of the old one.
 _ARTIFACT_FORMAT = "1"
 
-_REPO_ROOT = Path(__file__).resolve().parents[3]
-
 # The two per-plane infra VM roles. Each publishes/pulls its own rootfs artifact
 # from its own generic package; the Dockerfiles baked into each differ (only the
 # orchestrator rootfs carries buildah), so the versions are hashed separately.
@@ -74,7 +73,7 @@ def local_build_requested() -> bool:
 
 
 def infra_artifact_version(
-    init_script: str, role: str, *, repo_root: Path = _REPO_ROOT,
+    init_script: str, role: str, *, repo_root: Path | None = None,
 ) -> str:
     """Content hash (16 hex) of everything baked into `role`'s infra rootfs: the
     whole shipped `bot_bottle` package, that role's Dockerfiles, and its guest
@@ -89,6 +88,8 @@ def infra_artifact_version(
     version or a launch host could boot a stale rootfs whose code differs from
     its checkout. `__pycache__`/`.pyc` are the only exclusions — build artifacts,
     never copied."""
+    if repo_root is None:
+        repo_root = resources.build_root()
     h = hashlib.sha256()
     h.update(f"format={_ARTIFACT_FORMAT}\nrole={role}\n".encode())
     pkg = repo_root / "bot_bottle"

bot_bottle/backend/firecracker/infra_vm.py

@@ -42,6 +42,7 @@ from dataclasses import dataclass
 from pathlib import Path
 from typing import Generator
 
+from ... import resources
 from ...log import die, info
 from ..docker import util as docker_mod
 from . import firecracker_vm, infra_artifact, netpool, util
@@ -65,7 +66,6 @@ _GUEST_GATEWAY_JWT_PATH = "/var/lib/bot-bottle/gateway-jwt"
 _GATEWAY_IMAGE = "bot-bottle-gateway:latest"
 _ORCHESTRATOR_IMAGE = "bot-bottle-orchestrator:latest"
 _ORCHESTRATOR_FC_IMAGE = "bot-bottle-orchestrator-fc:latest"
-_REPO_ROOT = Path(__file__).resolve().parents[3]
 
 # Per-role rootfs source image + the extra free space `mke2fs` leaves for the
 # guest to grow into. The orchestrator keeps buildah's large build slack; the
@@ -130,12 +130,13 @@ def build_infra_images_with_docker() -> None:
     orchestrator + buildah). The gateway VM boots the gateway image directly.
     The launch host uses this only in `BOT_BOTTLE_INFRA_BUILD=local` mode;
     `publish_infra` uses it off-host to produce the published artifacts."""
+    root = str(resources.build_root())
     docker_mod.build_image(
-        _ORCHESTRATOR_IMAGE, str(_REPO_ROOT), dockerfile="Dockerfile.orchestrator")
+        _ORCHESTRATOR_IMAGE, root, dockerfile="Dockerfile.orchestrator")
     docker_mod.build_image(
-        _GATEWAY_IMAGE, str(_REPO_ROOT), dockerfile="Dockerfile.gateway")
+        _GATEWAY_IMAGE, root, dockerfile="Dockerfile.gateway")
     docker_mod.build_image(
-        _ORCHESTRATOR_FC_IMAGE, str(_REPO_ROOT), dockerfile="Dockerfile.orchestrator.fc")
+        _ORCHESTRATOR_FC_IMAGE, root, dockerfile="Dockerfile.orchestrator.fc")
 
 
 def build_rootfs_dir(role: str) -> Path:

bot_bottle/backend/firecracker/setup.py

@@ -20,6 +20,7 @@ import subprocess
 import sys
 from pathlib import Path
 
+from ... import resources
 from . import netpool
 from . import util
 
@@ -42,13 +43,13 @@ def _has_systemd() -> bool:
 
 
 def _module_path() -> str:
-    """Absolute path to the importable NixOS module in this checkout."""
+    """Absolute path to the importable NixOS module (checkout or wheel)."""
-    return str(Path(__file__).resolve().parents[3] / "nix" / "firecracker-netpool.nix")
+    return str(resources.nix_netpool_module())
 
 
 def _script_path() -> str:
-    """Absolute path to the bundled bring-up script in this checkout."""
+    """Absolute path to the bundled bring-up script (checkout or wheel)."""
-    return str(Path(__file__).resolve().parents[3] / "scripts" / "firecracker-netpool.sh")
+    return str(resources.netpool_script())
 
 
 def _print_prereqs() -> None:

bot_bottle/backend/macos_container/gateway.py

@@ -28,6 +28,7 @@ from ...paths import (
     ORCHESTRATOR_AUTH_JWT_ENV,
     host_gateway_ca_dir,
 )
+from ... import resources
 from .. import util as backend_util
 from . import util as container_mod
 
@@ -52,8 +53,6 @@ GATEWAY_DAEMONS = "egress,git-http,supervise"
 
 GATEWAY_IMAGE = os.environ.get("BOT_BOTTLE_GATEWAY_IMAGE", "bot-bottle-gateway:latest")
 
-_REPO_ROOT = Path(__file__).resolve().parents[3]
-
 
 def ensure_networks(
     network: str = GATEWAY_NETWORK,
@@ -84,14 +83,16 @@ class MacosGateway(Gateway):
         network: str = GATEWAY_NETWORK,
         egress_network: str = GATEWAY_EGRESS_NETWORK,
         control_network: str = CONTROL_NETWORK,
-        repo_root: Path = _REPO_ROOT,
+        repo_root: Path | None = None,
     ) -> None:
         self.image_ref = image_ref
         self.name = name
         self.network = network
         self.egress_network = egress_network
         self.control_network = control_network
-        self._repo_root = repo_root
+        # Build context: the repo root in a checkout, a staged copy from the
+        # installed wheel otherwise (bot_bottle.resources).
+        self._repo_root = repo_root if repo_root is not None else resources.build_root()
         # Set by `connect_to_orchestrator`: the URL the daemons resolve policy
         # against + the pre-minted `gateway` token they present. The gateway
         # never mints, so it never holds the signing key (#469).

bot_bottle/backend/macos_container/infra.py

@@ -24,6 +24,7 @@ from __future__ import annotations
 
 from pathlib import Path
 
+from ... import resources
 from ...orchestrator.lifecycle import (
     DEFAULT_PORT,
     DEFAULT_STARTUP_TIMEOUT_SECONDS,
@@ -53,8 +54,6 @@ from .orchestrator import (
 # still import it (probe / reprovision attribute against the gateway).
 INFRA_NAME = GATEWAY_NAME
 
-_REPO_ROOT = Path(__file__).resolve().parents[3]
-
 
 class MacosInfraService(InfraService):
     """Composes the per-host orchestrator + gateway containers. Callers use
@@ -70,7 +69,7 @@ class MacosInfraService(InfraService):
         control_network: str = CONTROL_NETWORK,
         gateway_image: str = GATEWAY_IMAGE,
         orchestrator_image: str = ORCHESTRATOR_IMAGE,
-        repo_root: Path = _REPO_ROOT,
+        repo_root: Path | None = None,
         orchestrator_name: str = ORCHESTRATOR_NAME,
         gateway_name: str = INFRA_NAME,
         db_volume: str = ORCHESTRATOR_DB_VOLUME,
@@ -81,7 +80,9 @@ class MacosInfraService(InfraService):
         self.control_network = control_network
         self.gateway_image = gateway_image
         self.orchestrator_image = orchestrator_image
-        self._repo_root = repo_root
+        # Build context / bind-mount source: the repo root in a checkout, a
+        # staged copy from the installed wheel otherwise (bot_bottle.resources).
+        self._repo_root = repo_root if repo_root is not None else resources.build_root()
         self._orchestrator_name = orchestrator_name
         self._gateway_name = gateway_name
         self._db_volume = db_volume

bot_bottle/backend/macos_container/launch.py

@@ -36,7 +36,6 @@ import dataclasses
 import os
 import subprocess
 from contextlib import ExitStack, contextmanager
-from pathlib import Path
 from typing import Callable, Generator
 
 from ...bottle_state import (
@@ -49,6 +48,7 @@ from ...git_gate import GitGate
 from ...gateway.git_gate.http_backend import DEFAULT_PORT as _GIT_HTTP_PORT
 from ...image_cache import check_stale
 from ...log import die, info, warn
+from ... import resources
 from .. import BottleImages
 from ...supervisor.types import SUPERVISE_PORT
 from ..docker.egress import EGRESS_PORT
@@ -71,7 +71,6 @@ from .consolidated_launch import (
     deprovision_consolidated,
 )
 
-_REPO_DIR = str(Path(__file__).resolve().parent.parent.parent.parent)
 _AGENT_SLEEP_SECONDS = "2147483647"
 
 
@@ -94,7 +93,7 @@ def _agent_image(plan: MacosContainerBottlePlan) -> str:
             )
         info(f"using cached agent image {plan.image!r}")
         return plan.image
-    container_mod.build_image(plan.image, _REPO_DIR, dockerfile=plan.dockerfile_path)
+    container_mod.build_image(plan.image, str(resources.build_root()), dockerfile=plan.dockerfile_path)
     return plan.image
 
 

bot_bottle/backend/macos_container/orchestrator.py

@@ -18,6 +18,7 @@ import urllib.request
 from pathlib import Path
 
 from ... import log
+from ... import resources
 from ...paths import ORCHESTRATOR_TOKEN_ENV
 from ...orchestrator.lifecycle import (
     DEFAULT_HEALTH_TIMEOUT_SECONDS,
@@ -45,7 +46,6 @@ _DB_ROOT_IN_CONTAINER = "/var/lib/bot-bottle"
 _SRC_IN_CONTAINER = "/bot-bottle-src"
 
 _HEALTH_POLL_SECONDS = 0.25
-_REPO_ROOT = Path(__file__).resolve().parents[3]
 
 
 class MacosOrchestrator(Orchestrator):
@@ -61,7 +61,7 @@ class MacosOrchestrator(Orchestrator):
         label: str = ORCHESTRATOR_LABEL,
         port: int = DEFAULT_PORT,
         control_network: str = CONTROL_NETWORK,
-        repo_root: Path = _REPO_ROOT,
+        repo_root: Path | None = None,
         db_volume: str = ORCHESTRATOR_DB_VOLUME,
     ) -> None:
         self.image_ref = image_ref
@@ -69,7 +69,9 @@ class MacosOrchestrator(Orchestrator):
         self.label = label
         self.port = port
         self.control_network = control_network
-        self._repo_root = repo_root
+        # Build context / bind-mount source: the repo root in a checkout, a
+        # staged copy from the installed wheel otherwise (bot_bottle.resources).
+        self._repo_root = repo_root if repo_root is not None else resources.build_root()
         self._db_volume = db_volume
 
     def url(self) -> str:

bot_bottle/gateway/__init__.py

@@ -62,7 +62,6 @@ GATEWAY_CA_GLOB = "mitmproxy-ca*"
 # that lands. Env override matches the backend's BOT_BOTTLE_GATEWAY_IMAGE.
 GATEWAY_IMAGE = os.environ.get("BOT_BOTTLE_GATEWAY_IMAGE", "bot-bottle-gateway:latest")
 GATEWAY_DOCKERFILE = "Dockerfile.gateway"
-REPO_ROOT = Path(__file__).resolve().parents[2]
 
 
 def rotate_gateway_ca(ca_dir: Path | None = None) -> list[Path]:

bot_bottle/resources.py

@@ -0,0 +1,159 @@
+"""Locate build-time resources whether bot-bottle runs from a source
+checkout or an installed wheel.
+
+The gateway / infra / orchestrator images are built from a Docker (or Apple
+`container`) build context that must contain the `bot_bottle` package,
+`pyproject.toml`, and the root-level Dockerfiles as siblings. In a source
+checkout that context is simply the repo root, one level above the package.
+An installed wheel has no repo root: the same root-level files are shipped
+inside the package under ``bot_bottle/_resources/`` (see ``setup.py``), and a
+repo-root-shaped build context is staged on demand into the app-data dir.
+
+``build_root()`` is the single source of truth — it returns a directory laid
+out like a repo root (has ``bot_bottle/``, ``pyproject.toml``, the
+Dockerfiles, ``nix/``, ``scripts/``). Every caller that needs a build
+context, a Dockerfile path, the nix netpool module, or the netpool script
+derives from it, so checkout and wheel installs share one downstream path.
+"""
+
+from __future__ import annotations
+
+import fcntl
+import hashlib
+import os
+import shutil
+import tempfile
+from pathlib import Path
+
+from .paths import bot_bottle_root
+
+_PKG = Path(__file__).resolve().parent          # …/bot_bottle
+_CHECKOUT_ROOT = _PKG.parent                     # repo root in a checkout
+_BUNDLED = _PKG / "_resources"                   # wheel-shipped copies
+
+# Root-level files bundled into the wheel under ``_resources/`` (paths are
+# relative to the checkout root, and preserved verbatim under ``_resources/``
+# and in the staged build root). ``setup.py`` copies exactly this set; keep
+# the two lists in sync (``test_resources`` guards that every entry exists).
+BUNDLED_RESOURCES: tuple[str, ...] = (
+    "pyproject.toml",
+    "Dockerfile.gateway",
+    "Dockerfile.orchestrator",
+    "Dockerfile.orchestrator.fc",
+    "nix/firecracker-netpool.nix",
+    "scripts/firecracker-netpool.sh",
+)
+
+# Present at a checkout root, never in a bare installed package — the cheap
+# tell for which layout we're in.
+_CHECKOUT_MARKER = "Dockerfile.gateway"
+
+
+class ResourceError(RuntimeError):
+    """Build resources are missing from the install (corrupt/partial wheel)."""
+
+
+def is_source_checkout() -> bool:
+    """True when running from a source tree (the root Dockerfiles sit beside
+    the package); False from an installed wheel."""
+    return (_CHECKOUT_ROOT / _CHECKOUT_MARKER).is_file()
+
+
+def build_root() -> Path:
+    """A directory shaped like a repo root: ``bot_bottle/``, ``pyproject.toml``,
+    the root Dockerfiles, ``nix/``, and ``scripts/``.
+
+    A checkout returns the repo root itself (no copying). An installed wheel
+    returns a staged copy under the app-data dir, materialized once and reused.
+    The stage is keyed by a digest of the installed package + bundled resources
+    (not the distribution version), so a force-reinstall of a newer commit that
+    keeps ``version = 0.1.0`` still rebuilds instead of reusing a stale tree."""
+    if is_source_checkout():
+        return _CHECKOUT_ROOT
+    return _stage_build_root()
+
+
+def dockerfile(name: str) -> Path:
+    """Absolute path to a root-level Dockerfile, e.g. ``Dockerfile.gateway``."""
+    return build_root() / name
+
+
+def nix_netpool_module() -> Path:
+    """Absolute path to the firecracker netpool NixOS module."""
+    return build_root() / "nix" / "firecracker-netpool.nix"
+
+
+def netpool_script() -> Path:
+    """Absolute path to the firecracker netpool bring-up script."""
+    return build_root() / "scripts" / "firecracker-netpool.sh"
+
+
+def _content_digest() -> str:
+    """A 16-hex digest of the installed package + bundled resources.
+
+    Keys the staged build root by *content*, so a force-reinstall over the same
+    version string (the installer defaults to a git branch + ``pipx install
+    --force``, and ``version`` stays ``0.1.0``) yields a different key and
+    re-stages, rather than reusing an old commit's tree. ``_PKG`` already
+    contains ``_resources``, so walking it covers both."""
+    h = hashlib.sha256()
+    for path in sorted(_PKG.rglob("*")):
+        if not path.is_file() or "__pycache__" in path.parts or path.suffix == ".pyc":
+            continue
+        h.update(str(path.relative_to(_PKG)).encode())
+        h.update(b"\0")
+        h.update(path.read_bytes())
+    return h.hexdigest()[:16]
+
+
+def _stage_build_root() -> Path:
+    """Materialize a repo-root-shaped build context from the installed wheel's
+    bundled resources, keyed by content digest. Idempotent and concurrency-safe:
+    a file lock serializes staging, a partial/stale tree is replaced, and the
+    finished tree is published with an atomic rename."""
+    if not _BUNDLED.is_dir():
+        raise ResourceError(
+            "bot-bottle build resources are missing from this install "
+            f"(expected {_BUNDLED}). Reinstall the package."
+        )
+    base = bot_bottle_root() / "build-root"
+    base.mkdir(parents=True, exist_ok=True)
+    dest = base / _content_digest()
+    if (dest / ".complete").is_file():
+        return dest
+
+    # Serialize staging across processes: a concurrent `start` after an install
+    # must not race on the shared tree. The lock is held only around stage +
+    # atomic publish; the fast path above never blocks.
+    with open(base / ".stage.lock", "w", encoding="utf-8") as lock:
+        fcntl.flock(lock, fcntl.LOCK_EX)
+        if (dest / ".complete").is_file():  # another process staged while we waited
+            return dest
+        # Stage into a private temp dir on the same filesystem, then publish by
+        # rename — never populate a shared path other processes might read.
+        staging = Path(tempfile.mkdtemp(prefix=".staging-", dir=base))
+        try:
+            # The package itself, minus caches and the bundled-resource copies,
+            # so the staged ``bot_bottle/`` matches a checkout's (keeps the
+            # firecracker infra-artifact hash stable across checkout and wheel).
+            shutil.copytree(
+                _PKG,
+                staging / "bot_bottle",
+                ignore=shutil.ignore_patterns("__pycache__", "*.pyc", "_resources"),
+            )
+            # The bundled root files, restored to their checkout-relative layout.
+            for rel in BUNDLED_RESOURCES:
+                dst = staging / rel
+                dst.parent.mkdir(parents=True, exist_ok=True)
+                shutil.copy2(_BUNDLED / rel, dst)
+            (staging / ".complete").write_text("")
+            # Replace any partial leftover for this digest (safe: we hold the
+            # lock), then publish atomically.
+            if dest.exists():
+                shutil.rmtree(dest)
+            os.replace(staging, dest)
+            staging = None  # published; nothing to clean up
+        finally:
+            if staging is not None:
+                shutil.rmtree(staging, ignore_errors=True)
+    return dest

docs/prds/prd-new-install-script.md

@@ -67,10 +67,54 @@ bot-bottle = "bot_bottle.cli:main"
 ```
 
 `bot_bottle.cli:main` already exists (the `cli.py` shim calls it), so no
-refactor of the entry point is needed. `package-data` ships the container
+refactor of the entry point is needed. `package-data` ships the non-Python
-Dockerfiles, `egress_entrypoint.sh`, the firecracker netpool defaults, and
+assets that live *inside* the package (`egress_entrypoint.sh`, the contrib
-the macos-container init script so an installed wheel can still build its
+Dockerfiles, the firecracker netpool defaults, the macos-container init
-sidecar/agent images.
+script).
+
+### Self-contained wheel (build resources)
+
+The gateway / infra / orchestrator images are built from a Docker (or Apple
+`container`) build context that must contain the `bot_bottle` package,
+`pyproject.toml`, and the **root-level** Dockerfiles as siblings. Several
+modules used to locate that context by walking `__file__`'s parents to the
+repo root (`_REPO_ROOT = Path(__file__)…parents[N]`) and reading
+`Dockerfile.gateway`, `nix/firecracker-netpool.nix`, and
+`scripts/firecracker-netpool.sh` from it. In an installed wheel the package
+lives in `site-packages` with no repo root above it, so those reads fail —
+`doctor` passes but `start` / backend setup breaks.
+
+Fix: a single resolver, `bot_bottle/resources.py`.
+
+- `build_root()` returns a directory shaped like a repo root (has
+  `bot_bottle/`, `pyproject.toml`, the Dockerfiles, `nix/`, `scripts/`).
+  In a **checkout** it's the repo root itself — unchanged behavior. From an
+  **installed wheel** it stages a copy under the app-data dir, keyed by a
+  **content digest** of the installed package + bundled resources (not the
+  distribution version): the installer defaults to a git branch and
+  `pipx install --force` while `version` stays `0.1.0`, so a version key
+  would reuse a previous commit's tree — the digest key re-stages instead.
+  Staging is concurrency-safe: a file lock serializes it, each writer builds
+  into a private temp dir, and the finished tree is published with an atomic
+  rename (never populating a shared path another process might read).
+- The root-level resources are shipped inside the wheel under
+  `bot_bottle/_resources/` by a `setup.py` `build_py` step (kept in sync
+  with `resources.BUNDLED_RESOURCES`); `MANIFEST.in` includes them in the
+  sdist.
+- Every former `_REPO_ROOT` / `_REPO_DIR` call site now derives from
+  `resources`: the docker/macos agent-image launch, each backend's
+  `orchestrator` / `gateway` / `infra` service, firecracker `infra_vm` /
+  `infra_artifact` / `setup`, and the shared `gateway` build context. So
+  checkout and wheel installs share one downstream path.
+
+Verification: `test_resources` exercises both layouts — including the staged
+wheel context, a re-stage when package content changes at the same version,
+and a rebuild of a partial (crashed) stage. `test_wheel_install` builds the
+wheel, installs it into an isolated venv, and asserts `bot-bottle doctor`
+runs and `build_root()` produces a valid context; `build` is in
+`requirements-dev.txt` so it runs in CI, and a build/install failure fails
+the test (it does not skip). Running `start` end-to-end still needs a
+Docker/KVM host (CI), not a source checkout.
 
 ### `install.sh`
 
@@ -78,8 +122,11 @@ A POSIX `sh` bootstrapper that:
 
 1. Checks `python3` is present and ≥ 3.11; exits with a clear message
    otherwise.
-2. Creates `~/.bot-bottle/{agents,bottles,contrib}`.
+2. Checks `git` when installing a `git+` spec, and — when falling back to
-3. Installs via `pipx` if available, else `python3 -m pip install --user`.
+   pip — that pip is usable and the interpreter isn't externally managed
+   (PEP 668), pointing at pipx otherwise.
+3. Creates `~/.bot-bottle/{agents,bottles,contrib}`.
+4. Installs via `pipx` if available, else `python3 -m pip install --user`.
    The spec defaults to the git URL and is overridable via
    `BOT_BOTTLE_INSTALL_SPEC` (used by tests / local installs).
 4. Locates the `bot-bottle` entry point (PATH or `~/.local/bin`).

install.sh

@@ -40,6 +40,41 @@ want = (int(sys.argv[1]), int(sys.argv[2]))
 raise SystemExit(0 if sys.version_info[:2] >= want else 1)
 PY
 
+# Installing a `git+` spec (the default) shells out to git under the hood,
+# whether via pipx or pip. Fail early with a clear message rather than deep
+# inside the installer's output.
+case "${PACKAGE_SPEC}" in
+    git+*|*.git)
+        command -v git >/dev/null 2>&1 || die \
+            "git is required to install from '${PACKAGE_SPEC}'. Install git, or set "\
+"BOT_BOTTLE_INSTALL_SPEC to a non-git spec (e.g. a wheel path or a package index name)."
+        ;;
+esac
+
+# The pip fallback needs a usable pip. Externally-managed interpreters
+# (PEP 668, common on Debian/Ubuntu/Homebrew) reject `pip install --user`;
+# pipx sidesteps that, so recommend it when pip can't be used.
+if ! command -v pipx >/dev/null 2>&1; then
+    python3 -m pip --version >/dev/null 2>&1 || die \
+        "neither pipx nor a usable 'python3 -m pip' was found. Install pipx "\
+"(recommended): 'python3 -m pip install --user pipx' or your OS package manager."
+    if python3 - <<'PY'
+import os
+import sys
+import sysconfig
+
+# PEP 668: an EXTERNALLY-MANAGED marker in the stdlib dir means pip refuses
+# to install into this interpreter without --break-system-packages.
+marker = os.path.join(sysconfig.get_path("stdlib"), "EXTERNALLY-MANAGED")
+raise SystemExit(0 if os.path.exists(marker) else 1)
+PY
+    then
+        die "this Python is externally managed (PEP 668), so 'pip install --user' is "\
+"blocked. Install pipx and re-run: 'python3 -m pip install --user --break-system-packages pipx', "\
+"then 'pipx ensurepath'."
+    fi
+fi
+
 # --- config directories ------------------------------------------------------
 
 mkdir -p \

pyproject.toml

@@ -36,7 +36,7 @@ include = ["bot_bottle*"]
 # files shipped under bot_bottle/; test_pyproject.py asserts they exist.
 [tool.setuptools.package-data]
 bot_bottle = [
-    "egress_entrypoint.sh",
+    "gateway/egress/entrypoint.sh",
     "contrib/claude/Dockerfile",
     "contrib/codex/Dockerfile",
     "contrib/pi/Dockerfile",

requirements-dev.txt

@@ -5,3 +5,6 @@
 pylint>=3.0.0
 pyright>=1.1.411
 coverage>=7.0.0
+# PEP 517 build front-end used by tests/unit/test_wheel_install.py to build and
+# install a real wheel (proves the installed distribution is self-contained).
+build>=1.0.0

setup.py

@@ -0,0 +1,46 @@
+"""Build shim. Project metadata lives in ``pyproject.toml``; this only adds a
+build step that copies the root-level build resources (the Dockerfiles, the
+nix netpool module, the netpool script, and ``pyproject.toml``) into
+``bot_bottle/_resources/`` so an installed wheel is self-contained and can
+build its gateway/infra/orchestrator images without a source checkout.
+
+Kept in sync with ``bot_bottle.resources.BUNDLED_RESOURCES`` — the
+``test_resources`` suite guards against drift between the two lists.
+"""
+
+from __future__ import annotations
+
+import shutil
+from pathlib import Path
+
+from setuptools import setup
+from setuptools.command.build_py import build_py
+
+_ROOT = Path(__file__).resolve().parent
+
+# Must match bot_bottle.resources.BUNDLED_RESOURCES (paths relative to root).
+_BUNDLED_RESOURCES = (
+    "pyproject.toml",
+    "Dockerfile.gateway",
+    "Dockerfile.orchestrator",
+    "Dockerfile.orchestrator.fc",
+    "nix/firecracker-netpool.nix",
+    "scripts/firecracker-netpool.sh",
+)
+
+
+class _BundleResources(build_py):
+    """Copy the root-level build resources into the built package tree so they
+    ship inside the wheel under ``bot_bottle/_resources/``."""
+
+    def run(self) -> None:
+        super().run()
+        pkg_resources = Path(self.build_lib) / "bot_bottle" / "_resources"
+        for rel in _BUNDLED_RESOURCES:
+            src = _ROOT / rel
+            dst = pkg_resources / rel
+            dst.parent.mkdir(parents=True, exist_ok=True)
+            shutil.copy2(src, dst)
+
+
+setup(cmdclass={"build_py": _BundleResources})

tests/unit/test_install_script.py

@@ -53,6 +53,21 @@ class TestInstallScript(unittest.TestCase):
         # Tests / local installs point BOT_BOTTLE_INSTALL_SPEC at a checkout.
         self.assertIn("BOT_BOTTLE_INSTALL_SPEC", self.text)
 
+    def test_requires_git_for_git_specs(self):
+        # A git+ / .git spec (the default) shells out to git; the script must
+        # gate on it rather than failing opaquely inside pipx/pip.
+        self.assertIn("command -v git", self.text)
+        self.assertIn("git+*|*.git", self.text)
+
+    def test_checks_pip_usable_before_fallback(self):
+        self.assertIn("python3 -m pip --version", self.text)
+
+    def test_detects_externally_managed_python(self):
+        # PEP 668: 'pip install --user' is blocked on externally-managed
+        # interpreters; the script must detect this and point at pipx.
+        self.assertIn("EXTERNALLY-MANAGED", self.text)
+        self.assertIn("pipx", self.text)
+
 
 if __name__ == "__main__":
     unittest.main()

tests/unit/test_macos_nested_containers.py

@@ -283,7 +283,7 @@ class TestBuildOrLoadImages(unittest.TestCase):
             images = launch_mod.build_or_load_images(plan)
 
         build.assert_called_once_with(
-            "agent:base", launch_mod._REPO_DIR,  # pylint: disable=protected-access
+            "agent:base", str(launch_mod.resources.build_root()),
             dockerfile="/repo/Dockerfile",
         )
         derived.assert_called_once_with("agent:base", build)

tests/unit/test_resources.py

@@ -0,0 +1,175 @@
+"""Unit: bot_bottle.resources — build-resource resolution for both a source
+checkout and an installed wheel.
+
+The checkout path is what the whole test suite already runs under; the wheel
+path is exercised here by faking an installed layout (a package dir with a
+bundled ``_resources/`` and no sibling Dockerfiles) and asserting that
+``build_root()`` stages a repo-root-shaped context. See
+``test_wheel_install.py`` for the end-to-end build+install check.
+"""
+
+from __future__ import annotations
+
+import tempfile
+import unittest
+from contextlib import contextmanager
+from pathlib import Path
+from unittest.mock import patch
+
+from bot_bottle import resources
+
+from tests.unit import use_bottle_root
+
+
+class TestCheckoutMode(unittest.TestCase):
+    """The environment the suite runs in: a real source checkout."""
+
+    def test_is_source_checkout(self):
+        self.assertTrue(resources.is_source_checkout())
+
+    def test_build_root_is_repo_root(self):
+        root = resources.build_root()
+        self.assertTrue((root / "bot_bottle").is_dir())
+        self.assertTrue((root / "pyproject.toml").is_file())
+        self.assertTrue((root / "Dockerfile.gateway").is_file())
+
+    def test_resource_helpers_resolve(self):
+        self.assertTrue(resources.dockerfile("Dockerfile.gateway").is_file())
+        self.assertTrue(resources.nix_netpool_module().is_file())
+        self.assertTrue(resources.netpool_script().is_file())
+
+    def test_bundled_resources_all_exist_at_root(self):
+        # Drift guard: every path setup.py bundles must exist in the checkout.
+        root = resources.build_root()
+        for rel in resources.BUNDLED_RESOURCES:
+            self.assertTrue((root / rel).is_file(), f"missing bundled resource: {rel}")
+
+
+class TestWheelMode(unittest.TestCase):
+    """Fake an installed wheel: a package dir with _resources/ and no
+    checkout Dockerfiles beside it."""
+
+    def _fake_install(self, tmp: Path) -> Path:
+        pkg = tmp / "site-packages" / "bot_bottle"
+        (pkg / "cli").mkdir(parents=True)
+        (pkg / "__init__.py").write_text("")
+        (pkg / "cli" / "__init__.py").write_text("# module\n")
+        bundled = pkg / "_resources"
+        for rel in resources.BUNDLED_RESOURCES:
+            dst = bundled / rel
+            dst.parent.mkdir(parents=True, exist_ok=True)
+            dst.write_text(f"# fake {rel}\n")
+        return pkg
+
+    @contextmanager
+    def _wheel(self):
+        """Point `resources` at a fake installed wheel with an isolated
+        app-data dir; yields the package dir so a test can mutate it."""
+        with tempfile.TemporaryDirectory() as tmpname:
+            tmp = Path(tmpname)
+            pkg = self._fake_install(tmp)
+            self.addCleanup(use_bottle_root(tmp / "appdata"))
+            with patch.object(resources, "_PKG", pkg), \
+                    patch.object(resources, "_BUNDLED", pkg / "_resources"), \
+                    patch.object(resources, "_CHECKOUT_ROOT", tmp / "no-checkout"):
+                yield pkg
+
+    def test_stage_and_resolve(self):
+        with self._wheel():
+            self.assertFalse(resources.is_source_checkout())
+            root = resources.build_root()
+            # Staged context looks like a repo root.
+            self.assertTrue((root / "bot_bottle" / "__init__.py").is_file())
+            self.assertTrue((root / "bot_bottle" / "cli" / "__init__.py").is_file())
+            self.assertTrue((root / "pyproject.toml").is_file())
+            self.assertTrue((root / "Dockerfile.gateway").is_file())
+            self.assertTrue((root / "nix" / "firecracker-netpool.nix").is_file())
+            self.assertTrue((root / "scripts" / "firecracker-netpool.sh").is_file())
+            # The bundled-resource copies are NOT re-nested under the staged
+            # package (keeps it byte-identical to a checkout package).
+            self.assertFalse((root / "bot_bottle" / "_resources").exists())
+            # Helpers resolve off the staged root.
+            self.assertEqual(root / "Dockerfile.gateway",
+                             resources.dockerfile("Dockerfile.gateway"))
+            # Idempotent: second call returns the same completed dir.
+            self.assertEqual(root, resources.build_root())
+
+    def test_refreshes_when_content_changes_at_same_version(self):
+        # Regression for the stale-cache bug: `pipx install --force` of a newer
+        # commit keeps version 0.1.0, so keying on version would reuse the old
+        # tree. Keying on content must re-stage when a package file changes.
+        with self._wheel() as pkg:
+            root1 = resources.build_root()
+            self.assertTrue((root1 / ".complete").is_file())
+            (pkg / "cli" / "__init__.py").write_text("# new commit, same version\n")
+            root2 = resources.build_root()
+            self.assertNotEqual(root1, root2)
+            self.assertEqual(
+                "# new commit, same version\n",
+                (root2 / "bot_bottle" / "cli" / "__init__.py").read_text(),
+            )
+
+    def test_rebuilds_when_stage_incomplete(self):
+        # A crash mid-stage can leave a dir without its `.complete` marker; the
+        # next call must rebuild it rather than trust the partial tree.
+        with self._wheel():
+            root = resources.build_root()
+            (root / ".complete").unlink()
+            (root / "sentinel").write_text("stale")
+            again = resources.build_root()
+            self.assertEqual(root, again)  # same content digest → same dir
+            self.assertTrue((again / ".complete").is_file())
+            self.assertFalse((again / "sentinel").exists())  # rebuilt clean
+
+    def test_reuses_peer_stage_after_lock_wait(self):
+        # Regression for the staging race: a caller that loses the lock must,
+        # once it wins, see the peer's completed tree and reuse it — never
+        # re-clobber a shared path. Drive it deterministically: hold the lock,
+        # let a worker block after its fast-path miss, publish a complete tree
+        # as the "peer", then release so the worker takes the reuse path.
+        import fcntl
+        import threading
+        import time
+
+        with self._wheel():
+            base = resources.bot_bottle_root() / "build-root"
+            base.mkdir(parents=True, exist_ok=True)
+            dest = base / resources._content_digest()  # pylint: disable=protected-access
+
+            result: dict[str, Path] = {}
+            with open(base / ".stage.lock", "w", encoding="utf-8") as held:
+                fcntl.flock(held, fcntl.LOCK_EX)
+
+                def worker() -> None:
+                    result["root"] = resources.build_root()
+
+                t = threading.Thread(target=worker)
+                t.start()
+                # Let the worker miss the fast path (dest not yet complete) and
+                # block on the held lock, then publish a complete tree as a peer
+                # would have and release the lock.
+                time.sleep(0.3)
+                dest.mkdir(parents=True)
+                (dest / ".complete").write_text("")
+                fcntl.flock(held, fcntl.LOCK_UN)
+                t.join(timeout=10)
+
+            self.assertEqual(dest, result["root"])
+            self.assertFalse(t.is_alive())
+
+    def test_missing_bundle_raises(self):
+        with tempfile.TemporaryDirectory() as tmpname:
+            tmp = Path(tmpname)
+            pkg = tmp / "bot_bottle"
+            pkg.mkdir()
+            restore = use_bottle_root(tmp / "appdata")
+            self.addCleanup(restore)
+            with patch.object(resources, "_PKG", pkg), \
+                    patch.object(resources, "_BUNDLED", pkg / "_resources"), \
+                    patch.object(resources, "_CHECKOUT_ROOT", tmp / "no-checkout"):
+                with self.assertRaises(resources.ResourceError):
+                    resources.build_root()
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/unit/test_wheel_install.py

@@ -0,0 +1,119 @@
+"""Integration: build the wheel, install it into an isolated venv, and prove
+the installed distribution is self-contained.
+
+This is the boundary a source-tree existence test can't reach (issue #197
+review): under an installed wheel the package lives in ``site-packages`` with
+no repo root above it, so anything resolving Dockerfiles / nix / scripts from
+``__file__``'s parents would break. Here we install for real and assert that
+``bot-bottle doctor`` runs from the console script and that
+``bot_bottle.resources`` stages a valid, repo-root-shaped build context.
+
+It does NOT run `start` — building images needs a Docker/KVM host (CI). It
+skips cleanly when the build/venv toolchain isn't available.
+"""
+
+from __future__ import annotations
+
+import subprocess
+import sys
+import tempfile
+import unittest
+from pathlib import Path
+
+REPO_ROOT = Path(__file__).resolve().parents[2]
+
+
+class TestWheelInstall(unittest.TestCase):
+    """`build` is a declared dev dependency (requirements-dev.txt), so this runs
+    in CI. A build/install failure is a real packaging regression and FAILS —
+    only genuinely-unsupported infra (no `venv`/`ensurepip`) skips."""
+
+    _tmp: "tempfile.TemporaryDirectory[str]"
+    venv_py: Path
+    app_root: Path
+
+    @classmethod
+    def setUpClass(cls):
+        cls._tmp = tempfile.TemporaryDirectory(  # pylint: disable=consider-using-with
+            prefix="bb-wheel-")
+        tmp = Path(cls._tmp.name)
+        dist = tmp / "dist"
+
+        # A failed wheel build is exactly the regression this test guards — fail,
+        # don't skip. `build` is installed via requirements-dev.txt.
+        built = subprocess.run(
+            [sys.executable, "-m", "build", "--wheel", "--outdir", str(dist), str(REPO_ROOT)],
+            capture_output=True, text=True, check=False,
+        )
+        if built.returncode != 0:
+            raise AssertionError(f"wheel build failed:\n{built.stderr[-2000:]}")
+        wheels = list(dist.glob("*.whl"))
+        if not wheels:
+            raise AssertionError(f"no wheel produced:\n{built.stdout[-2000:]}")
+
+        # A missing `venv`/`ensurepip` is unsupported optional infra, not a
+        # packaging bug — skip only here.
+        venv = tmp / "venv"
+        made = subprocess.run([sys.executable, "-m", "venv", str(venv)],
+                              capture_output=True, text=True, check=False)
+        if made.returncode != 0:
+            raise unittest.SkipTest(f"venv/ensurepip unavailable:\n{made.stderr[-1500:]}")
+        cls.venv_py = venv / "bin" / "python"
+
+        # Installing the freshly-built wheel must succeed — fail if it doesn't.
+        install = subprocess.run(
+            [str(cls.venv_py), "-m", "pip", "install", "--quiet", str(wheels[0])],
+            capture_output=True, text=True, check=False,
+        )
+        if install.returncode != 0:
+            raise AssertionError(f"pip install of the wheel failed:\n{install.stderr[-2000:]}")
+
+        # Isolate the staged build root the wheel writes under the app-data dir.
+        cls.app_root = tmp / "appdata"
+
+    @classmethod
+    def tearDownClass(cls):
+        cls._tmp.cleanup()
+
+    def _run(self, tail: "list[str]") -> "subprocess.CompletedProcess[str]":
+        """Run the installed venv's python with `tail` appended, from a neutral
+        cwd so the source checkout isn't on sys.path — we must import the
+        *installed* package, not the repo we built from."""
+        env = {"BOT_BOTTLE_ROOT": str(self.app_root), "PATH": "/usr/bin:/bin"}
+        return subprocess.run(
+            [str(self.venv_py), *tail],
+            capture_output=True, text=True, env=env, cwd=self._tmp.name, check=False,
+        )
+
+    def test_console_entry_point_installed(self):
+        # The `bot-bottle` script the wheel declares must exist in the venv.
+        script = self.venv_py.parent / "bot-bottle"
+        self.assertTrue(script.is_file(), "bot-bottle console script not installed")
+
+    def test_doctor_runs_from_installed_package(self):
+        proc = self._run(["-m", "bot_bottle.cli", "doctor"])
+        # doctor exits non-zero here (no backend), but it must RUN and report.
+        self.assertIn("python", proc.stdout)
+        self.assertIn(proc.returncode, (0, 1))
+
+    def test_installed_wheel_is_self_contained(self):
+        # From the installed layout (not a checkout), resources must resolve
+        # Dockerfiles and stage a repo-root-shaped build context.
+        script = (
+            "import bot_bottle.resources as r\n"
+            "assert not r.is_source_checkout(), 'should not look like a checkout'\n"
+            "assert r.dockerfile('Dockerfile.gateway').is_file()\n"
+            "assert r.nix_netpool_module().is_file()\n"
+            "assert r.netpool_script().is_file()\n"
+            "root = r.build_root()\n"
+            "assert (root / 'bot_bottle' / '__init__.py').is_file(), 'no package in context'\n"
+            "assert (root / 'pyproject.toml').is_file(), 'no pyproject in context'\n"
+            "assert (root / 'Dockerfile.gateway').is_file(), 'no Dockerfile in context'\n"
+            "print('SELF_CONTAINED_OK')\n"
+        )
+        proc = self._run(["-c", script])
+        self.assertIn("SELF_CONTAINED_OK", proc.stdout, msg=proc.stderr)
+
+
+if __name__ == "__main__":
+    unittest.main()