anchor.diff:      homepage = https://github.com/pubs/pubs;
       license = licenses.lgpl3;
       maintainers = with maintainers; [ gebner ];
  -    platforms = platforms.all;
     };
   }
  
positive.code: 
    propagatedBuildInputs = with python3Packages; [
      dateutil configobj bibtexparser pyyaml requests beautifulsoup4
      pyfakefs ddt
    ];
  
    preCheck = ''
      # API tests require networking
  
negative.code: { stdenv, fetchFromGitHub, python3 }:
  
  let
    python3Packages = (python3.override {
      packageOverrides = self: super: {
        # https://github.com/pubs/pubs/issues/131
        pyfakefs = super.pyfakefs.overridePythonAttrs (oldAttrs: rec {
          version = "3.3";
          src = self.fetchPypi {
            pname = "pyfakefs";
            inherit version;
            sha256 = "e3e198dea5e0d5627b73ba113fd0b139bb417da6bc15d920b2c873143d2f12a6";
          };
          postPatch = "";
          doCheck = false;
        });
      };
    }).pkgs;
  
  in python3Packages.buildPythonApplication rec {
    pname = "pubs";
    version = "0.7.0";
  
    src = fetchFromGitHub {
  