anchor.diff: -{ stdenv, fetchFromGitHub, python3Packages }:
  +{ stdenv, fetchFromGitHub, python3 }:
   
  -python3Packages.buildPythonApplication rec {
  -  name = "pubs-${version}";
  +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 {
  
positive.code:     homepage = https://github.com/pubs/pubs;
      license = licenses.lgpl3;
      maintainers = with maintainers; [ gebner ];
      platforms = platforms.all;
    };
  }
  
negative.code: 
    propagatedBuildInputs = with python3Packages; [
      dateutil configobj bibtexparser pyyaml requests beautifulsoup4
    ];
  
    checkInputs = with python3Packages; [ pyfakefs ddt ];
  
    preCheck = ''
      # API tests require networking
  