### Check existing issues - [x] I've verified that this bug isn't described by any existing issues. ### Bug description `CHARMCRAFT_EXPERIMENTAL_MONOREPO=1 charmcraft pack` fails with ``` :: + cp --archive --link --no-dereference . /root/parts/files/install :: cp: cannot create hard link '/root/parts/files/install/./pyproject.toml' to './pyproject.toml': File exists :: cp: cannot create hard link '/root/parts/files/install/./poetry.lock' to './poetry.lock': File exists :: cp: cannot create hard link '/root/parts/files/install/./metadata.yaml' to './metadata.yaml': File exists :: cp: cannot create hard link '/root/parts/files/install/./charmcraft.yaml' to './charmcraft.yaml': File exists ``` after a previous pack failed (for a different reason). Occurs only on repacks, not clean packs ### Steps to reproduce ``` git clone https://github.com/carlcsaposs-canonical/bug-report-charmcraft-monorepo-repack cd bug-report-charmcraft-monorepo-repack/kubernetes/ CHARMCRAFT_EXPERIMENTAL_MONOREPO=1 charmcraft pack -v CHARMCRAFT_EXPERIMENTAL_MONOREPO=1 charmcraft pack -v ``` ### Environment LXD, ubuntu 26.04 ### charmcraft.yaml ```yaml type: charm platforms: ubuntu@26.04:amd64: ubuntu@26.04:arm64: parts: charm-poetry: plugin: poetry source: .. source-subdir: kubernetes/ files: plugin: dump source: .. source-subdir: kubernetes/ override-build: | craftctl default exit 1 ``` ### Log output ```shell ubuntu@dualla:~$ git clone https://github.com/carlcsaposs-canonical/bug-report-charmcraft-monorepo-repack Cloning into 'bug-report-charmcraft-monorepo-repack'... remote: Enumerating objects: 12, done. remote: Counting objects: 100% (12/12), done. remote: Compressing objects: 100% (8/8), done. remote: Total 12 (delta 0), reused 12 (delta 0), pack-reused 0 (from 0) Receiving objects: 100% (12/12), done. ubuntu@dualla:~$ cd bug-report-charmcraft-monorepo-repack/kubernetes/ ubuntu@dualla:~/bug-report-charmcraft-monorepo-repack/kubernetes$ CHARMCRAFT_EXPERIMENTAL_MONOREPO=1 charmcraft pack -v Starting charmcraft, version 4.5.0 Logging execution to '/home/ubuntu/.local/state/charmcraft/log/charmcraft-20261022-111102.907563.log' Launching managed ubuntu 26.04 instance... Creating instance from base instance Starting instance Starting charmcraft, version 4.5.0 Logging execution to '/tmp/charmcraft.log' Initializing lifecycle Installing build-packages Pulling charm-poetry Pulling files Building charm-poetry :: + python3 -m venv --without-pip /root/parts/charm-poetry/install/venv :: + PARTS_PYTHON_VENV_INTERP_PATH=/root/parts/charm-poetry/install/venv/bin/python3 :: + poetry export --format=requirements.txt --output=/root/parts/charm-poetry/build/requirements.txt --with-credentials :: +++ which python3 :: ++ readlink -f /usr/bin/python3 :: + /usr/bin/python3.14 -m pip --python=/root/parts/charm-poetry/install/venv/bin/python3 install --no-deps --no-binary=:all: --requirement=/root/parts/charm-poetry/build/requirements.txt :: Processing /root/parts/charm-poetry/build/common (from -r /root/parts/charm-poetry/build/requirements.txt (line 1)) :: Installing build dependencies: started :: Installing build dependencies: finished with status 'done' :: Getting requirements to build wheel: started :: Getting requirements to build wheel: finished with status 'done' :: Preparing metadata (pyproject.toml): started :: Preparing metadata (pyproject.toml): finished with status 'done' :: Building wheels for collected packages: common :: Building wheel for common (pyproject.toml): started :: Building wheel for common (pyproject.toml): finished with status 'done' :: Created wheel for common: filename=common-0.1.0-py2.py3-none-any.whl size=975 sha256=4d1d9b6844cc3bfb99ba8a7d80be6c3004d3cd80fea02c155f14a48ecd7884f7 :: Stored in directory: /tmp/pip-ephem-wheel-cache-2wka7vvg/wheels/d7/fe/b4/644d0c428d267358ff9bf1a023387f1923c76744fe887ce9ff :: Successfully built common :: Installing collected packages: common :: Successfully installed common-0.1.0 :: +++ which python3 :: ++ readlink -f /usr/bin/python3 :: + /usr/bin/python3.14 -m pip --python=/root/parts/charm-poetry/install/venv/bin/python3 check :: No broken requirements found. :: ++ set +o :: ++ grep errexit :: + opts_state='set +o errexit' :: + set +e :: + install_dir=/root/parts/charm-poetry/install/usr/bin :: + stage_dir=/root/stage/usr/bin :: +++ readlink -f /root/parts/charm-poetry/install/venv/bin/python3 :: ++ basename /usr/bin/python3.14 :: + basename=python3.14 :: + echo Looking for a Python interpreter called '"python3.14"' in the payload... :: Looking for a Python interpreter called "python3.14" in the payload... :: ++ find /root/parts/charm-poetry/install/usr/bin /root/stage/usr/bin -type f -executable -name python3.14 -print -quit :: ++ true :: + payload_python= :: + '[' -n '' ']' :: + echo 'Python interpreter not found in payload.' :: Python interpreter not found in payload. :: +++ which python3 :: ++ readlink -f /usr/bin/python3 :: + symlink_target=/usr/bin/python3.14 :: + '[' -z /usr/bin/python3.14 ']' :: + eval 'set +o errexit' :: ++ set +o errexit :: + echo Removing python symlinks in /root/parts/charm-poetry/install/venv/bin :: + rm /root/parts/charm-poetry/install/venv/bin/python /root/parts/charm-poetry/install/venv/bin/python3 /root/parts/charm-poetry/install/venv/bin/python3.14 :: Removing python symlinks in /root/parts/charm-poetry/install/venv/bin :: + shopt -s extglob :: + rm -rf /root/parts/charm-poetry/install/venv/bin/Activate.ps1 /root/parts/charm-poetry/install/venv/bin/activate.csh /root/parts/charm-poetry/install/venv/bin/activate.fish /root/parts/charm-poetry/install/venv/bin/𝜋thon :: + shopt -u extglob :: + sed -i 's#^VIRTUAL_ENV=.*$#VIRTUAL_ENV="$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )/.." \&> /dev/null \&\& pwd )"#' /root/parts/charm-poetry/install/venv/bin/activate :: + '[' -L /root/parts/charm-poetry/install/venv/lib64 ']' :: + rm -f /root/parts/charm-poetry/install/venv/lib64 Building files :: + craftctl default :: + cp --archive --link --no-dereference . /root/parts/files/install :: + exit 1 'override-build' in part 'files' failed with code 1. Detailed information: :: + craftctl default :: + exit 1 Recommended resolution: Review the scriptlet and make sure it's correct. For more information, check out: https://documentation.ubuntu.com/charmcraft/4/reference/plugins/ Failed to run charmcraft in instance Full execution log: '/home/ubuntu/.local/state/charmcraft/log/charmcraft-20261022-111102.907563.log' ubuntu@dualla:~/bug-report-charmcraft-monorepo-repack/kubernetes$ CHARMCRAFT_EXPERIMENTAL_MONOREPO=1 charmcraft pack -v Starting charmcraft, version 4.5.0 Logging execution to '/home/ubuntu/.local/state/charmcraft/log/charmcraft-20261022-111342.742597.log' Launching managed ubuntu 26.04 instance... Starting instance Starting charmcraft, version 4.5.0 Logging execution to '/tmp/charmcraft.log' Initializing lifecycle Installing build-packages Skipping pull for charm-poetry (already ran) Skipping pull for files (already ran) Skipping build for charm-poetry (already ran) Building files :: + craftctl default :: + cp --archive --link --no-dereference . /root/parts/files/install :: cp: cannot create hard link '/root/parts/files/install/./pyproject.toml' to './pyproject.toml': File exists :: cp: cannot create hard link '/root/parts/files/install/./poetry.lock' to './poetry.lock': File exists :: cp: cannot create hard link '/root/parts/files/install/./metadata.yaml' to './metadata.yaml': File exists :: cp: cannot create hard link '/root/parts/files/install/./charmcraft.yaml' to './charmcraft.yaml': File exists Failed to run the build script for part 'files'. Detailed information: :: + cp --archive --link --no-dereference . /root/parts/files/install :: cp: cannot create hard link '/root/parts/files/install/./pyproject.toml' to './pyproject.toml': File exists :: cp: cannot create hard link '/root/parts/files/install/./poetry.lock' to './poetry.lock': File exists :: cp: cannot create hard link '/root/parts/files/install/./metadata.yaml' to './metadata.yaml': File exists :: cp: cannot create hard link '/root/parts/files/install/./charmcraft.yaml' to './charmcraft.yaml': File exists Recommended resolution: Check the build output and verify the project can work with the 'dump' plugin. For more information, check out: https://documentation.ubuntu.com/charmcraft/4/reference/plugins/ Failed to run charmcraft in instance Full execution log: '/home/ubuntu/.local/state/charmcraft/log/charmcraft-20261022-111342.742597.log' ```