anchor.diff:      click-didyoumean
       click-help-colors
       colorama
  +    gql
       gradient_statsd
       gradient-utils
       halo
  
positive.code: , fetchPypi
  , gradient_statsd
  , gradient-utils
  , halo
  , marshmallow
  , progressbar2
  
negative.code: 
  buildPythonPackage rec {
    pname = "gradient";
    version = "1.9.1";
    format = "setuptools";
  
    src = fetchPypi {
      inherit pname version;
      hash = "sha256-zimOh4bc9EQGpqMky/etwnAF04onJ2m/KAl29IaAeAY=";
    };
  
    postPatch = ''
      substituteInPlace setup.py \
        --replace 'attrs<=' 'attrs>=' \
        --replace 'colorama==' 'colorama>=' \
        --replace 'gql[requests]==3.0.0a6' 'gql' \
        --replace 'PyYAML==' 'PyYAML>=' \
        --replace 'marshmallow<' 'marshmallow>=' \
        --replace 'websocket-client==' 'websocket-client>='
  