{ prev, sources, ... }:
{
  postfix-mta-sts-resolver =
    with prev.poetry2nix;
    mkPoetryApplication {
      python = prev.python311;
      inherit (sources.postfix-mta-sts-resolver) pname version;
      overrides = overrides.withDefaults (self: super: {
        pyyaml = super.pyyaml.override { preferWheel = true; };
      });
      projectDir = cleanPythonSources {
        src = prev.runCommand "sources" {} ''
          mkdir $out
          cp -r ${sources.postfix-mta-sts-resolver.src}/. $out

          cp ${./pyproject.toml} $out/pyproject.toml
          cp ${./poetry.lock} $out/poetry.lock
        '';
      };
    };
}