anchor.diff:  , tox
   , unicorn
   , intervaltree
  -, fetchpatch
  +, installShellFiles
   }:
   
   buildPythonPackage rec {
  
positive.code: , buildPythonPackage
  , debugger
  , fetchPypi
  , isPy3k
  , Mako
  , makeWrapper
  , packaging
  , pysocks
  , pygments
  
negative.code: 
    doCheck = false; # no setuptools tests for the package
  
    postInstall = ''
      installShellCompletion --bash extra/bash_completion.d/shellcraft
    '';
  
    postFixup = ''
      mkdir -p "$out/bin"
      makeWrapper "${debugger}/bin/${lib.strings.getName debugger}" "$out/bin/pwntools-gdb"
  