anchor.diff:  
     docker = buildFromGitHub {
       version = 2;
  -    rev = "2cf32ee04360add15b4431ba55032824ac089349";
  +    rev = "a8bcef6fddb21e7edcf1050631dfd8e6491297ae";
       owner = "docker";
       repo = "docker";
  -    sha256 = "1rl77qxvnvkvg0ajv6swx02602pf6gwqdppkp1i9ka9ba3lfzj4a";
  +    sha256 = "1zdz5ff9xa7pcjz3h2hhn14mkwzixc7ll085fk7vbivcrwmz2r9v";
       meta.useUnstable = true;
  -    date = "2016-12-20";
  +    date = "2016-12-22";
     };
   
     docker_for_runc = buildFromGitHub {
  
positive.code: 
    ginkgo = buildFromGitHub {
      version = 2;
      rev = "00054c0bb96fc880d4e0be1b90937fad438c5290";
      owner = "onsi";
      repo = "ginkgo";
      sha256 = "1d41f560r6nsw69ghh3q5ny869pp3ar0pmhm3rmsyrs62h153c91";
      date = "2016-11-10";
    };
  
    gjson = buildFromGitHub {
  
negative.code: 
    hil = buildFromGitHub {
      version = 2;
      date = "2016-12-21";
      rev = "5b8d13c8c5c2753e109fab25392a1dbfa2db93d2";
      owner  = "hashicorp";
      repo   = "hil";
      sha256 = "1gc7kw6bp3kaixqbaiga92ywhqs1mrdablp9297kgvbgnhdz44gn";
      propagatedBuildInputs = [
        mapstructure
        reflectwalk
  