anchor.diff:  
     lego = buildFromGitHub {
       version = 2;
  -    rev = "bb51288200705e835bdc7829f4f121f1dbffd827";
  +    rev = "e953bbc8b95ad7d2f7172ae6732e71069be48957";
       owner = "xenolf";
       repo = "lego";
  -    sha256 = "18g6h5vgpyrfsn9xsc854m8nhk51xvjwwrivxvvjcgw0s2lvz25k";
  +    sha256 = "1ipmghws2pawcfr2l5zgfnj98lhkv9s7h8naa8kd8f2glwdx8xph";
   
       buildInputs = [
         aws-sdk-go
  
positive.code: 
    crypto = buildFromGitHub {
      version = 2;
      rev = "9e9c7d4ed3e28836a0741f74011e308570bec743";
      date = "2016-10-13";
      owner    = "golang";
      repo     = "crypto";
      sha256 = "1p0cylkdscgnzdbycx9g93nbavy1c9fkhga0chvnayvgg3br13dh";
      goPackagePath = "golang.org/x/crypto";
      goPackageAliases = [
        "code.google.com/p/go.crypto"
  
negative.code: 
    go-dockerclient = buildFromGitHub {
      version = 2;
      date = "2016-10-21";
      rev = "425c52204cf4791085dabf1883aa0953660def9c";
      owner = "fsouza";
      repo = "go-dockerclient";
      sha256 = "0ljgy7rdsib0x5xd0x2vd9vq5axavv9qky1c944ygqxgzcqrgp6g";
      propagatedBuildInputs = [
        docker_for_go-dockerclient
        go-cleanhttp
  