units: fix build with enableCurrenciesUpdater=false; pythonPackages=null;#182172
Conversation
…ull;
Units allows to build it without a python dependency by setting {
enableCurrenciesUpdater=false; pythonPackages=null; }. Unfortunately
this feature is currently broken due to two problems:
1. The `pythonEnv` string is part of the builder environment, so it is
not evaluated lazily. This means that `pythonPackages==null` will
always cause eval to fail.
2. `pythonEnv` is used unconditionally in an antiquotation in the
`prePatch` phase; if it is null this will fail.
Let's fix these so we can build a pythonless "units" package.
This is helpful when cross-compiling, because right now a lot of
python packages (especially python-cryptography) fail to
cross-compile.
Author
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Ping @vrthra |
Author
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Ping |
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Description of changes
Units allows to build it without a python dependency by setting { enableCurrenciesUpdater=false; pythonPackages=null; }. Unfortunately this feature is currently broken due to two problems:
The
pythonEnvstring is part of the builder environment, so it is not evaluated lazily. This means thatpythonPackages==nullwill always cause eval to fail.pythonEnvis used unconditionally in an antiquotation in theprePatchphase; if it is null this will fail.Let's fix these so we can build a pythonless "units" package.
This is helpful when cross-compiling, because right now a lot of python packages (especially python-cryptography) fail to cross-compile.
Things done
nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage./result/bin/)