anchor.diff:  
     image-spec = buildFromGitHub {
       version = 3;
  -    rev = "af173bcb2fb0e0b95f240b914c4791f69738b765";
  +    rev = "d9ffa2f05d4dbe917edfdffcafaf427287a26d1c";
       owner  = "opencontainers";
       repo   = "image-spec";
  -    sha256 = "0rpvjrg8b6amjnnr81nzvy4dqzd4szk83r9ssjw7vw80v7idv9py";
  -    date = "2017-06-23";
  +    sha256 = "0i101m71vcm5sx91q9hrh5xs79ziyjx3qqz9a328j8h9ghg1mwan";
  +    date = "2017-06-26";
       propagatedBuildInputs = [
         errors
         go4
  
positive.code: 
    go-dockerclient = buildFromGitHub {
      version = 3;
      date = "2017-06-14";
      rev = "9e921e30db8bcc1221fa0485ad9ce5b195fb4445";
      owner = "fsouza";
      repo = "go-dockerclient";
      sha256 = "01qi8nrf8kbv2msabr9433lqilmik5ms92ihv2fmgqwl4335qfzw";
      propagatedBuildInputs = [
        go-cleanhttp
        go-units
  
negative.code:     version = 3;
      owner = "moby";
      repo = "moby";
      rev = "8f3c526e7851e047f5dde31bd2ce69f960e1d115";
      date = "2017-06-27";
      sha256 = "024r4r007dinl0mp91mlym92k0y2rx4x03ffz4q7349l5lbb9zk2";
      goPackageAliases = [
        "github.com/docker/docker"
      ];
  