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How to use custom Python distributions

The built-in Python management capabilities offer full support for using custom distributions.

Configuration

Configuring custom Python distributions is done entirely through three environment variables that must all be defined, for each desired distribution. In the following sections, the placeholder <NAME> is the uppercased version of the distribution name with periods replaced by underscores e.g. pypy3.10 would become PYPY3_10.

Source

The HATCH_PYTHON_CUSTOM_SOURCE_<NAME> variable is the URL to the distribution's archive. The value must end with the archive's real file extension, which is used to determine the extraction method.

The following extensions are supported:

Extensions Description
  • .tar.bz2
  • .bz2
 A tar file with bzip2 compression
  • .tar.gz
  • .tgz
 A tar file with gzip compression
  • .tar.zst
  • .tar.zstd
 A tar file with Zstandard compression
  • .zip
 A ZIP file with DEFLATE compression

Python path

The HATCH_PYTHON_CUSTOM_PATH_<NAME> variable is the path to the Python interpreter within the archive. This path is relative to the root of the archive and must be a Unix-style path, even on Windows.

Version

The HATCH_PYTHON_CUSTOM_VERSION_<NAME> variable is the version of the distribution. This value is used to determine whether updates are required and is displayed in the output of the python show command.