anchor.diff: -{ stdenv, fetchurl, makeWrapper, which, coreutils, rrdtool, perl, perlPackages
  +{ stdenv, fetchgit, makeWrapper, which, coreutils, rrdtool, perl, perlPackages
   , python, ruby, openjdk, nettools
   }:
   
  
positive.code: 
    preBuild = ''
      substituteInPlace "Makefile" \
        --replace "/bin/pwd" "pwd"
  
      # munin checks at build time if user/group exists, unpure
      sed -i '/CHECKUSER/d' Makefile
  
negative.code:   version = "2.0.19";
    name = "munin-${version}";
  
    src = fetchgit {
      url = "git://github.com/munin-monitoring/munin.git";
      rev = "refs/tags/${version}";
      sha256 = "0027rrdrmcql68b475jlxnfgkijbfngynkjpdii6fgaszswqz3ay";
    };
  
    buildInputs = [ 
  