anchor.diff:  , tox
   , unicorn
   , intervaltree
  -, fetchpatch
  +, installShellFiles
   }:
   
   buildPythonPackage rec {
  
positive.code:   postPatch = ''
      sed -i 's/unicorn>=1.0.2rc1,<1.0.2rc4/unicorn>=1.0.2rc1/' setup.py
    '';
  
    propagatedBuildInputs = [
      Mako
  
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"
  