pythonPackages.tox is broken

[tbenst]

Describe the bug
Broken by 5d95fcb (tested nix-build -I nixpkgs=. -A "python3Packages.tox" build before and after)

ERROR: Could not find a version that satisfies the requirement importlib-metadata<2,>=1.1.0; python_version < "3.8" (from tox==3.14.2) (from versions: none)
ERROR: No matching distribution found for importlib-metadata<2,>=1.1.0; python_version < "3.8" (from tox==3.14.2)

Maintainer information:
@FRidh @

[prusnak]

Will be fixed when #76059 is merged

[tobim]

For anyone that can't update their home-manager configuration because of this, you can temporarily add the following snippet into your ~/.config/nixpkgs/config.nix as a workaround:

{
  packageOverrides = pkgs: {
    python3 = pkgs.python3.override {
      packageOverrides = self: super:
      let
        importlib-metadata = super.importlib-metadata.overridePythonAttrs(old: rec {
          version = "1.3.0";
          src =  super.fetchPypi {
            pname = "importlib_metadata";
            inherit version;
            sha256 = "0ibvvqajphwdclbr236gikvyja0ynvqjlix38kvsabgrf0jqafh7";
          };
        });
      in {
        tox = super.tox.overridePythonAttrs(old: rec {
          catchConflicts = false;
          buildInputs = old.buildInputs ++ [ importlib-metadata ];
        });
      };
    };
  };
}

[stale]

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[prusnak]

This was fixed by #76059