anchor.diff:      mkdir -p $out/share $out/bin
       cp $src/main.py $out/share/matrix.py
   
  -    cp $src/contrib/matrix_upload $out/bin/
  +    cp \
  +      $src/contrib/matrix_upload \
  +      $src/contrib/matrix_decrypt \
  +      $src/contrib/matrix_sso_helper \
  +      $out/bin/
       substituteInPlace $out/bin/matrix_upload \
  -      --replace '/usr/bin/env -S python3 -u' '${matrixUploadPython}/bin/python -u' 
  -  
  +      --replace '/usr/bin/env -S python3' '${scriptPython}/bin/python'
  +    substituteInPlace $out/bin/matrix_sso_helper \
  +      --replace '/usr/bin/env -S python3' '${scriptPython}/bin/python'
  +    substituteInPlace $out/bin/matrix_decrypt \
  +      --replace '/usr/bin/env python3' '${scriptPython}/bin/python'
  +   
       mkdir -p $out/${python.sitePackages}
       cp -r $src/matrix $out/${python.sitePackages}/matrix
     '';
  
positive.code:     homepage = "https://github.com/poljar/weechat-matrix";
      license = licenses.isc;
      platforms = platforms.linux;
      maintainers = [ maintainers.tilpner ];
    };
  }
  
negative.code: { buildPythonPackage
  , stdenv
  , python
  , fetchFromGitHub
  , pyopenssl
  , webcolors
  , future
  , atomicwrites
  , attrs
  , Logbook
  , pygments
  , matrix-nio
  , aiohttp
  , requests
  }:
  
  let
    scriptPython = python.withPackages (ps: with ps; [
      aiohttp
      requests
      python_magic
    ]);
  in buildPythonPackage {
    pname = "weechat-matrix";
    version = "unstable-2020-01-21";
  
    src = fetchFromGitHub {
      owner = "poljar";
      repo = "weechat-matrix";
      rev = "46640df3e0bfb058e97d8abe723bb88fdf4e5177";
      sha256 = "1j3l43j741csfxsp1nsc74y6wj2wm86c45iraf167g6p0sdzcq8z";
    };
  
    propagatedBuildInputs = [
  