Bug: PythonUvBuilder fails to build app with dependencies on editable installs in the workspace #892

workspace root
├── lib
│  ├── pyproject.toml
│  └── src
├── pyproject.toml
├── sam-app
│  ├── __init__.py
│  ├── app.py
│  ├── pyproject.toml
│  ├── samconfig.toml
│  └── template.yaml
└── uv.lock

uv init --bare
uv init --lib lib
sam init --name sam-app --runtime python3.14 --architecture arm64 \
 --dependency-manager pip --package-type Zip \
 --app-template hello-world
cd sam-app
uv init
uv add lib@../lib
# remove requirements.txt and edit the app
# edit template.yaml to configure `BuildMethod: python-uv` and `CodeUri: .`
sam build --beta-features

2026年07月15日 13:49:33,345 | Building from UV lock file
2026年07月15日 13:49:33,346 | Executing UV command: /Users/me/.cargo/bin/uv export --format requirements.txt --no-emit-project --no-hashes --no-default-groups --output-file
/var/folders/8s/g1znx0c90vx3tz81t_rqqgyr0000gn/T/tmptz94ffbg/lock_requirements.txt --python 3.14
2026年07月15日 13:49:33,499 | UV command return code: 0
2026年07月15日 13:49:33,500 | UV stdout: # This file was autogenerated by uv via the following command:
# uv export --format requirements.txt --no-emit-project --no-hashes --no-default-groups --output-file /var/folders/8s/g1znx0c90vx3tz81t_rqqgyr0000gn/T/tmptz94ffbg/lock_requirements.txt --python 3.14
-e ./lib
 # via sam-app
2026年07月15日 13:49:33,500 | UV stderr: Using CPython 3.14.6 interpreter at: /opt/homebrew/opt/python@3.14/bin/python3.14
Resolved 3 packages in 8ms
2026年07月15日 13:49:33,501 | Executing UV command: /Users/me/.cargo/bin/uv pip install -r /var/folders/8s/g1znx0c90vx3tz81t_rqqgyr0000gn/T/tmptz94ffbg/lock_requirements.txt --target
/Users/me/workspace/sam-app/.aws-sam/deps/351538c7-a05e-4aad-b5c5-928f241070b6 --cache-dir /var/folders/8s/g1znx0c90vx3tz81t_rqqgyr0000gn/T/tmptz94ffbg/uv-cache
--python-version 3.14 --python-platform aarch64-unknown-linux-gnu
2026年07月15日 13:49:33,653 | UV command return code: 2
2026年07月15日 13:49:33,655 | UV stdout:
2026年07月15日 13:49:33,656 | UV stderr: Using CPython 3.13.0 interpreter at: /Users/me/workspace/.venv/bin/python3
error: Distribution not found at: file:///Users/me/workspace/sam-app/lib
2026年07月15日 13:49:33,657 | Failed to build dependencies: UV package build failed: Failed to build from pyproject.toml: Lock file operation failed: Failed to install dependencies using uv: UV pip install
failed: Using CPython 3.13.0 interpreter at: /Users/me/workspace/.venv/bin/python3
error: Distribution not found at: file:///Users/me/workspace/sam-app/lib
2026年07月15日 13:49:33,662 | PythonUvBuilder:ResolveDependencies failed
Traceback (most recent call last):
 File "/opt/homebrew/Cellar/aws-sam-cli/1.162.1/libexec/lib/python3.14/site-packages/aws_lambda_builders/workflows/python_uv/packager.py", line 348, in _build_from_lock_file
 self._uv_runner.install_requirements(
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
 requirements_path=temp_requirements,
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 ...<6 lines>...
 architecture=architecture,
 ^^^^^^^^^^^^^^^^^^^^^^^^^^
 )
 ^
 File "/opt/homebrew/Cellar/aws-sam-cli/1.162.1/libexec/lib/python3.14/site-packages/aws_lambda_builders/workflows/python_uv/packager.py", line 167, in install_requirements
 raise UvInstallationError(reason=f"UV pip install failed: {stderr}")
aws_lambda_builders.workflows.python_uv.exceptions.UvInstallationError: Failed to install dependencies using uv: UV pip install failed: Using CPython 3.13.0 interpreter at:
/Users/me/workspace/.venv/bin/python3
error: Distribution not found at: file:///Users/me/workspace/sam-app/lib
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
 File "/opt/homebrew/Cellar/aws-sam-cli/1.162.1/libexec/lib/python3.14/site-packages/aws_lambda_builders/workflows/python_uv/packager.py", line 389, in _build_from_pyproject
 self._build_from_lock_file(lock_path, target_dir, scratch_dir, python_version, architecture, config)
 ~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 File "/opt/homebrew/Cellar/aws-sam-cli/1.162.1/libexec/lib/python3.14/site-packages/aws_lambda_builders/workflows/python_uv/packager.py", line 361, in _build_from_lock_file
 raise LockFileError(reason=str(e))
aws_lambda_builders.workflows.python_uv.exceptions.LockFileError: Lock file operation failed: Failed to install dependencies using uv: UV pip install failed: Using CPython 3.13.0 interpreter at:
/Users/me/workspace/.venv/bin/python3
error: Distribution not found at: file:///Users/me/workspace/sam-app/lib
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
 File "/opt/homebrew/Cellar/aws-sam-cli/1.162.1/libexec/lib/python3.14/site-packages/aws_lambda_builders/workflows/python_uv/actions.py", line 68, in execute
 package_builder.build_dependencies(
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
 artifacts_dir_path=target_artifact_dir,
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 ...<3 lines>...
 config=self.config,
 ^^^^^^^^^^^^^^^^^^^
 )
 ^
 File "/opt/homebrew/Cellar/aws-sam-cli/1.162.1/libexec/lib/python3.14/site-packages/aws_lambda_builders/workflows/python_uv/packager.py", line 229, in build_dependencies
 handler(manifest_path, artifacts_dir_path, scratch_dir_path, python_version, architecture, config)
 ~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 File "/opt/homebrew/Cellar/aws-sam-cli/1.162.1/libexec/lib/python3.14/site-packages/aws_lambda_builders/workflows/python_uv/packager.py", line 282, in _handle_pyproject_build
 self._build_from_pyproject(manifest_path, target_dir, scratch_dir, python_version, architecture, config)
 ~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 File "/opt/homebrew/Cellar/aws-sam-cli/1.162.1/libexec/lib/python3.14/site-packages/aws_lambda_builders/workflows/python_uv/packager.py", line 392, in _build_from_pyproject
 raise UvBuildError(reason=f"Failed to build from pyproject.toml: {str(e)}")
aws_lambda_builders.workflows.python_uv.exceptions.UvBuildError: UV package build failed: Failed to build from pyproject.toml: Lock file operation failed: Failed to install dependencies using uv: UV pip
install failed: Using CPython 3.13.0 interpreter at: /Users/me/workspace/.venv/bin/python3
error: Distribution not found at: file:///Users/me/workspace/sam-app/lib
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
 File "/opt/homebrew/Cellar/aws-sam-cli/1.162.1/libexec/lib/python3.14/site-packages/aws_lambda_builders/workflow.py", line 374, in run
 action.execute()
 ~~~~~~~~~~~~~~^^
 File "/opt/homebrew/Cellar/aws-sam-cli/1.162.1/libexec/lib/python3.14/site-packages/aws_lambda_builders/workflows/python_uv/actions.py", line 76, in execute
 raise ActionFailedError(str(ex))
aws_lambda_builders.actions.ActionFailedError: UV package build failed: Failed to build from pyproject.toml: Lock file operation failed: Failed to install dependencies using uv: UV pip install failed:
Using CPython 3.13.0 interpreter at: /Users/me/workspace/.venv/bin/python3
error: Distribution not found at: file:///Users/me/workspace/sam-app/lib
2026年07月15日 13:49:33,711 | Exception raised during the execution
Build Failed