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Dots in the python package name seem to break package resolution.

See original GitHub issue

This passes fine:

let
  machnix = import (
    builtins.fetchGit {
      url = "https://github.com/DavHau/mach-nix/";
      ref = "2.1.0";
    }
  );
in
machnix.mkPython rec {
  requirements = ''
    requests==2.24.0 
  '';
}

While this breaks:

let
  machnix = import (
    builtins.fetchGit {
      url = "https://github.com/DavHau/mach-nix/";
      ref = "2.1.0";
    }
  );
in
machnix.mkPython rec {
  requirements = ''
    discord.py==1.3.4
  '';
}

with this stacktrace:

building '/nix/store/z7cpqqvx49icx1k6fwd50fd60d88c4mq-mach_nix_file.drv'...
Traceback (most recent call last):
  File "/nix/store/r06crfb7v84wazad55pysgn6jckv7288-python3-3.7.6-env/lib/python3.7/site-packages/resolvelib/resolvers.py", line 185, in _merge_into_criterion
    crit = self.state.criteria[name]
KeyError: 'discord.py'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/nix/store/r06crfb7v84wazad55pysgn6jckv7288-python3-3.7.6-env/lib/python3.7/site-packages/resolvelib/resolvers.py", line 280, in resolve
    name, crit = self._merge_into_criterion(r, parent=None)
  File "/nix/store/r06crfb7v84wazad55pysgn6jckv7288-python3-3.7.6-env/lib/python3.7/site-packages/resolvelib/resolvers.py", line 187, in _merge_into_criterion
    crit = Criterion.from_requirement(self._p, requirement, parent)
  File "/nix/store/r06crfb7v84wazad55pysgn6jckv7288-python3-3.7.6-env/lib/python3.7/site-packages/resolvelib/resolvers.py", line 87, in from_requirement
    raise RequirementsConflicted(criterion)
resolvelib.resolvers.RequirementsConflicted: Requirements conflict: Requirement.parse('discord.py==1.3.4')

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/nix/store/8a5g856g76h0c7kkvw23i7706q451l85-j82lzp1rgj9jfav9zjb1sgk1gfd8gk99-source/mach_nix/generate.py", line 54, in <module>
    main()
  File "/nix/store/8a5g856g76h0c7kkvw23i7706q451l85-j82lzp1rgj9jfav9zjb1sgk1gfd8gk99-source/mach_nix/generate.py", line 48, in main
    expr = generator.generate(reqs)
  File "/nix/store/8a5g856g76h0c7kkvw23i7706q451l85-j82lzp1rgj9jfav9zjb1sgk1gfd8gk99-source/mach_nix/generators/overlay_generator.py", line 29, in generate
    pkgs = self.resolver.resolve(reqs)
  File "/nix/store/8a5g856g76h0c7kkvw23i7706q451l85-j82lzp1rgj9jfav9zjb1sgk1gfd8gk99-source/mach_nix/resolver/resolvelib_resolver.py", line 62, in resolve
    result = resolvelib.Resolver(Provider(self.nixpkgs, self.deps_provider), reporter).resolve(reqs, max_rounds=1000)
  File "/nix/store/r06crfb7v84wazad55pysgn6jckv7288-python3-3.7.6-env/lib/python3.7/site-packages/resolvelib/resolvers.py", line 413, in resolve
    state = resolution.resolve(requirements, max_rounds=max_rounds)
  File "/nix/store/r06crfb7v84wazad55pysgn6jckv7288-python3-3.7.6-env/lib/python3.7/site-packages/resolvelib/resolvers.py", line 282, in resolve
    raise ResolutionImpossible(e.criterion.information)
resolvelib.resolvers.ResolutionImpossible: [RequirementInformation(requirement=Requirement.parse('discord.py==1.3.4'), parent=None)]
builder for '/nix/store/z7cpqqvx49icx1k6fwd50fd60d88c4mq-mach_nix_file.drv' failed with exit code 1

Issue Analytics

State:
Created 3 years ago
Comments:5 (2 by maintainers)

Top GitHub Comments

1reaction

DavHaucommented, Jul 23, 2020

Thanks for reporting. Maybe a better error message should be printed to inform the user if other versions of that package are available and a hint how to manually upgrade the deps db.

0reactions

d6ecommented, Jul 23, 2020

Ahh right, good point. Still new to nix.

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