anchor.diff:  { stdenv, fetchurl, makeWrapper, go, lxc, sqlite, iproute, bridge_utils, devicemapper,
  -btrfsProgs, iptables, bash}:
  +btrfsProgs, iptables, bash, e2fsprogs}:
   
   stdenv.mkDerivation rec {
     name = "docker-${version}";
  
positive.code:     sha256 = "1pa6k3gx940ap3r96xdry6apzkm0ymqra92b2mrp25b25264cqcy";
    };
  
    buildInputs = [ makeWrapper go sqlite lxc iproute bridge_utils devicemapper btrfsProgs iptables ];
  
    dontStrip = true;
  
  
negative.code:   installPhase = ''
      install -Dm755 ./bundles/${version}/dynbinary/docker-${version} $out/bin/docker
      install -Dm755 ./bundles/${version}/dynbinary/dockerinit-${version} $out/bin/dockerinit
      wrapProgram $out/bin/docker --prefix PATH : "${iproute}/sbin:sbin:${lxc}/bin:${iptables}/sbin:${e2fsprogs}/sbin"
  
      # systemd
      install -Dm644 ./contrib/init/systemd/docker.service $out/etc/systemd/system/docker.service
  