anchor.diff:      lockfile
       paste
     ];
  +
     prePatch = ''
       # replace /bin/bash in compress.sh
       patchShebangs .
   
       # relax version constraints of some dependencies
       substituteInPlace setup.cfg \
  +      --replace "clize==4.1.1" "clize" \
         --replace "bleach==3.1.5" "bleach>=3.1.5,<4" \
         --replace "bottle==0.12.18" "bottle>=0.12.18,<1" \
         --replace "Paste==3.4.3" "Paste>=3.4.3,<4"
     '';
  +
     buildPhase = ''
       runHook preBuild
       doit build
  
positive.code: python3Packages.buildPythonApplication rec {
    pname = "zerobin";
    version = "1.0.5";
    src = fetchFromGitHub {
      owner = "Tygs";
      repo = "0bin";
  
negative.code:     python3Packages.pyscss
      nodePackages.uglify-js
    ];
  
    propagatedBuildInputs = with python3Packages; [
      appdirs
      beaker
  