forked from mirrors/nixpkgs
pythonPackages.setuptoolsBuildHook: do not build in an isolated environment
When a PEP 517 project file is present, pip will not install prerequisites in `site-packages`: https://pip.pypa.io/en/stable/reference/pip/#pep-517-and-518-support For the shell hook, this has the consequence that the generated temporary directory that is added to PYTHONPATH does not contain `site.py`. As a result, Python does not discover the Python module. Thus when a user executes nix-shell in a project, they cannot import the project's Python module. This change adds the `--no-build-isolation` option to pip when creating the editable environment, to correctly generate `site.py`, even when a `pyproject.toml` is present.
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@ -29,7 +29,8 @@ setuptoolsShellHook() {
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export PATH="$tmp_path/bin:$PATH"
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export PYTHONPATH="$tmp_path/@pythonSitePackages@:$PYTHONPATH"
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mkdir -p "$tmp_path/@pythonSitePackages@"
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eval "@pythonInterpreter@ -m pip install -e . --prefix $tmp_path >&2"
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eval "@pythonInterpreter@ -m pip install -e . --prefix $tmp_path \
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--no-build-isolation >&2"
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fi
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runHook postShellHook
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