uv-pack 0.2.0

Transform your uv project into a portable, offline-ready environment with all dependencies bundled.

uv-pack

Bundle a locked uv environment into a self-contained, offline-installable directory. The output includes pinned requirements, third-party wheels, locally built wheels, and a portable Python interpreter.

What it does

• Exports locked requirements from your uv lock file.
• Downloads third-party wheels into pack/wheels/.
• Builds local workspace packages into pack/vendor/.
• Downloads a python-build-standalone archive into pack/python/ (unless you skip the python step).
• Writes unpack.sh and unpack.ps1 to unpack the resulting venv offline.

Install

Install uv-pack as a dev-dependency.

uv add --dev uv-pack

Once installed, run using:

uv run uv-pack --help

You can also use uv-pack as a tool.

# specify the python version!
uv tool run --python 3.12 uv-pack --help
# or using uvx (equivalent)
uvx --python 3.12 uv-pack --help

CLI

uv-pack [STEPS...]

Options:

• STEPS: subset of pipeline steps (default: clean export download build python)
• -s, --skip: skip a pipeline step (can be supplied multiple times)
• -o, --output-directory: path to output directory (default: ./pack)
• -v, --verbose: show more detailed pack progress logging
• --uv-build: extra args passed to uv build
• --uv-export: extra args passed to uv export
• --pip-download: extra args passed to pip download

Pipeline steps:

• clean: remove the output directory
• export: write requirements.txt files for third-party and local packages
• download: download third-party wheels and sources
• build: build local wheels and compile the combined requirements file
• python: download a python-build-standalone archive for the current Python version, platform, and ABI flavor

Example

# run the entire pipeline (default) with verbose outputs
uv-pack --verbose
# only clean and export the requirements
uv-pack clean export

Output layout

pack/
  requirements.txt
  wheels/
    requirements.txt
  vendor/
    requirements.txt
  python/   # (omitted when the python step is skipped)
  unpack.sh
  unpack.ps1
  .gitignore
  README.md

Unpack and install offline

POSIX (sh/bash/zsh):

./pack/unpack.sh

PowerShell:

.\pack\unpack.ps1

All scripts also accept VENV_DIR, PYTHON_DIR and BASE_PY environment variables. Use BASE_PY when you skipped the python step during packing to provide a system python interpreter. VENV_DIR (default = .venv) and PYTHON_DIR (default = .python) can be used to customize the target python and venv directory. Set VENV_DIR="" to skip creating a virtual environment and install directly into BASE_PY.

Configuration

UV_PYTHON_INSTALL_MIRROR can override the GitHub API endpoint to retrieve the Python releases, default is: https://api.github.com/repos/astral-sh/python-build-standalone/releases/latest.

GITHUB_TOKEN can be used to authenticate requests to the GitHub API to prevent possible rate-limiting.

Limitations

• The pack process must happen in the pyproject.toml or uv.toml directory, typically the repository root, because uv exports relative paths to the project root.
• The build platform is expected to equal the usage platform; it is currently not possible to pack an environment for a different platform.
• The embedded Python ABI flavor is inferred from the interpreter running uv-pack. Run uv-pack with free-threaded Python to produce a free-threaded pack.
• The project Python version is ignored when running uv-pack as a tool (uv tool run or uvx) and should be specified using uv tool run --python 3.11 uv-pack or uvx --python 3.11 uv-pack, see uv#uv5951 and uv#8206.
• The download process can be slow because pip download is used as there is no native (parallel) uv download option available for wheels, see uv#3163.

FAQ

How do I pass extra options to uv export or another command?

Use --uv-export to forward arguments, for example:

• uv-pack --uv-export "--package $MY_PACKAGE" to export only a specific workspace package
• uv-pack --uv-export "--locked --dev" to include dev-deps and ensure an up-to-date lock file
• uv-pack --uv-export "--all-extras" to include all extra dependencies

The same is true for --uv-build and --pip-download arguments.

How do I specify index-urls and extra-index-urls?

The index urls set in pyproject.toml and uv.toml are not configured by default for the wheel download (pip download), you can specify them as:

• uv-pack --pip-download "--index-url $MY_INDEX --extra-index-url $MY_EXTRA_INDEX"

How do I skip bundling Python?

Skip the python step: uv-pack --skip python. When unpacking, set BASE_PY to a system Python path.

How do I install directly into a system Python instead of creating .venv?

Set BASE_PY to the target interpreter and VENV_DIR="" when unpacking. For example:

BASE_PY=/usr/bin/python3 VENV_DIR="" sh ./pack/unpack.sh

How do I rerun without deleting the existing pack directory?

Skip the clean step: uv-pack --skip clean. Note that this automatically re-uses downloaded wheels and the downloaded Python interpreter.

How do I only re-build my package if my pack is already complete?

Run only uv-pack build.

How can I use my pack?

Move the pack to the final location and, depending on the shell used, call unpack.sh or unpack.ps1. Don't move the virtual environment or pack folder after unpacking (hardcoded paths).