anchor.diff:      repo   = "go-reap";
       sha256 = "01pahld0vdssw6550bwhjbs0cm1g0hwd21lg1i57lk8i4pwp0fd9";
       date = "2016-01-13";
  -    buildInputs = [ sys ];
  +    propagatedBuildInputs = [ sys ];
     };
   
     go-restful = buildFromGitHub {
  
positive.code:     ];
    };
  
    vcs = buildFromGitHub {
      rev    = "1.0.0";
      owner  = "Masterminds";
  
negative.code:   };
  
    net = buildFromGitHub {
      rev = "d58ca6618b994150e624f6888d871f4709db51a0";
      date = "2016-03-04";
      owner  = "golang";
      repo   = "net";
      sha256 = "0j3692kp5y9i462j48w1awmys1hhvf7wvpvv4xhh89xkza4cwvy8";
      goPackagePath = "golang.org/x/net";
      goPackageAliases = [
        "code.google.com/p/go.net"
  