Handle absent lzma library #771

	# For documentation on GitHub Actions Workflows, see:
	# https://docs.github.com/en/actions/reference/workflow-syntax-for-github-actions
	name: MyPy

	on: [push, pull_request]

	permissions:
	contents: read

	jobs:
	mypy:
	strategy:
	matrix:
	os: [ubuntu-latest]
	python-version: ["3.11"]
	fail-fast: false
	runs-on: ${{ matrix.os }}
	steps:
	- uses: actions/checkout@v4 # https://github.com/actions/checkout
	with:
	# Only a single commit is fetched by default, for the ref/SHA that triggered the workflow.
	# Set fetch-depth: 0 to fetch all history for all branches and tags.
	fetch-depth: 0 # Needed for setuptools_scm to work correctly
	- name: Set up Python
	uses: actions/setup-python@v5 # https://github.com/actions/setup-python
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install python prerequisites
	run: pip install -U --user pip setuptools setuptools-scm nox
	- name: MyPy
	run: python -m nox --non-interactive --session validate-${{ matrix.python-version }} -k mypy # Run nox for mypy

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