anchor.diff:  { stdenv, fetchFromGitHub, makeWrapper, cmake, llvmPackages, kernel
   , flex, bison, elfutils, python, luajit, netperf, iperf, libelf
  -, systemtap
  +, systemtap, bash
   }:
   
   python.pkgs.buildPythonApplication rec {
  -  version = "0.11.0";
  +  version = "0.12.0";
     name = "bcc-${version}";
   
  -  srcs = [
  -    (fetchFromGitHub {
  -      owner  = "iovisor";
  -      repo   = "bcc";
  -      rev    = "v${version}";
  -      sha256 = "1v2gzdd4k58f3yxmq4z97a7xh5vyd84flzzfr9k2cm29i93cwcam";
  -      name   = "bcc";
  -    })
  -
  -    # note: keep this in sync with the version that was used at the time of the
  -    # tagged release!
  -    (fetchFromGitHub {
  -      owner  = "libbpf";
  -      repo   = "libbpf";
  -      rev    = "a30df5c09fb3941fc42c4570ed2545e7057bf82a";
  -      sha256 = "088vb9sfs1zazlqi6abb3ia1xgpmwiz5pmz6y3a6gbh0zdrgh6px";
  -      name   = "libbpf";
  -    })
  -  ];
  -  sourceRoot = "bcc";
  +  src = fetchFromGitHub {
  +    owner  = "iovisor";
  +    repo   = "bcc";
  +    rev    = "v${version}";
  +    sha256 = "1r2yjxam23k56prsvjhqf8i8d3irhcvmy0bly6x23h1jc3zc6yym";
  +    fetchSubmodules = true;
  +  };
     format = "other";
   
     buildInputs = with llvmPackages; [
       llvm clang-unwrapped kernel
       elfutils luajit netperf iperf
  -    systemtap.stapBuild flex
  +    systemtap.stapBuild flex bash
     ];
   
     patches = [
  
positive.code:       if [ ! -e $bin ]; then
          ln -s $f $bin
        fi
      done
  
      sed -i -e "s!lib=.*!lib=$out/bin!" $out/bin/{java,ruby,node,python}gc
  
negative.code:     patch -p1 < libbcc-path.patch
    '';
  
    postInstall = ''
      mkdir -p $out/bin $out/share
      rm -r $out/share/bcc/tools/old
  