anchor.diff: -{ stdenv, lib, fetchFromGitHub, bash, makeWrapper, git, mysql, diffutils, which, coreutils, procps, nettools }:
  +{ stdenv, fetchFromGitHub, bash, makeWrapper, git, mysql, diffutils, which, coreutils, procps, nettools
  +,supportOpenstack ? true
  +}:
  +
  +with stdenv.lib;
   
   stdenv.mkDerivation rec {
     name = "snabb-${version}";
  -  version = "2016.04";
  +  version = "2018.01.2";
   
     src = fetchFromGitHub {
       owner = "snabbco";
       repo = "snabb";
       rev = "v${version}";
  -    sha256 = "1b5g477zy6cr5d9171xf8zrhhq6wxshg4cn78i5bki572q86kwlx";
  +    sha256 = "0n6bjf5g4imy0aql8fa55c0db3w8h944ia1dk10167x5pqvkgdgm";
     };
   
     buildInputs = [ makeWrapper ];
  
positive.code:   # "Fatal error: can't create obj/arch/sse2_c.o: No such file or directory".
    enableParallelBuilding = false;
  
    meta = with stdenv.lib; {
      homepage = https://github.com/SnabbCo/snabbswitch;
      description = "Simple and fast packet networking toolkit";
      longDescription = ''
  
negative.code:     for f in $(find src/program/snabbnfv/ -type f); do
        substituteInPlace $f --replace "/bin/bash" "${bash}/bin/bash"
      done
    '' + optionalString supportOpenstack ''
      # We need a way to pass $PATH to the scripts
      sed -i '2iexport PATH=${git}/bin:${mysql}/bin:${which}/bin:${procps}/bin:${coreutils}/bin' src/program/snabbnfv/neutron_sync_master/neutron_sync_master.sh.inc
      sed -i '2iexport PATH=${git}/bin:${coreutils}/bin:${diffutils}/bin:${nettools}/bin' src/program/snabbnfv/neutron_sync_agent/neutron_sync_agent.sh.inc
    '';
  
    preBuild = ''
      make clean
    '';
  
    installPhase = ''
  