anchor.diff:  
     roaring = buildFromGitHub {
       version = 3;
  -    rev = "v0.3.11";
  +    rev = "v0.3.12";
       owner  = "RoaringBitmap";
       repo   = "roaring";
  -    sha256 = "15n9s7clapydgdzqih79ix844rilsql5q6xdfb4kb3vz2x8cl6nl";
  +    sha256 = "1snp5bi1bc86r5xfl55zsahp6c39m52wgvdpcq2xiyfx809zy061";
       propagatedBuildInputs = [
         go-unsnap-stream
         msgp
  
positive.code:       yaml_v2
      ];
      meta.useUnstable = true;
      date = "2017-10-19";
      postPatch = ''
        rm cmd/gateway-{azure,s3}*.go
        sed -i 's,return newAzureLayer.*,break,' cmd/gateway-main.go
  
negative.code: 
    netlink = buildFromGitHub {
      version = 3;
      rev = "b2de5d10e38ecce8607e6b438b6d174f389a004e";
      owner  = "vishvananda";
      repo   = "netlink";
      sha256 = "0485hf122i93j4nv2005vq204rvsyqn04d9ryj6n3a1garra8ja6";
      date = "2017-10-20";
      propagatedBuildInputs = [
        netns
      ];
  