anchor.diff:  
     crypto = buildFromGitHub {
       version = 3;
  -    rev = "e7ba82683099cae71475961448ab8f903ea77c26";
  -    date = "2017-06-06";
  +    rev = "850760c427c516be930bc91280636328f1a62286";
  +    date = "2017-06-13";
       owner    = "golang";
       repo     = "crypto";
  -    sha256 = "0wb22hqkc4cyk2m3pj77r8khfimn3gh2dispw5sb4ay9blbmpj4j";
  +    sha256 = "0kdypzpwi2xpq3y1pqd9fm4fmc2yivpipswinxrawkzp0j9dllbl";
       goPackagePath = "golang.org/x/crypto";
       buildInputs = [
         net_crypto_lib
  
positive.code:     version = 3;
      owner = "moby";
      repo = "moby";
      rev = "4310f7da7e6bcd8185bf05e032f9b7321cfa6ea2";
      date = "2017-06-13";
      sha256 = "1xjig74rk459rfjcml8z8hmyrr0x9l7afpnxibl291kgm7r66nvz";
      goPackageAliases = [
        "github.com/docker/docker"
      ];
  
negative.code: 
    syncthing = buildFromGitHub rec {
      version = 3;
      rev = "v0.14.30";
      owner = "syncthing";
      repo = "syncthing";
      sha256 = "1x4lf64wzqff6jrxq41wd0k3k5h98id6sajg0alsshsj6cafihrk";
      buildFlags = [ "-tags noupgrade" ];
      buildInputs = [
        AudriusButkevicius_cli
  