anchor.diff:      version = 2;
       owner = "rakyll";
       repo = "statik";
  -    date = "2017-03-21";
  -    rev = "a2b6c3587a59db225063f31599468f3348e8f445";
  -    sha256 = "0xcapkz3hnsxg1n2gyy1cscn3bd0lxk5ph182i0h8kjr5jsv5i6h";
  +    date = "2017-04-10";
  +    rev = "89fe3459b5c829c32e89bdff9c43f18aad728f2f";
  +    sha256 = "027iy2yrppplr4yc14ixriaar5m6b1y3x3z0svlfi8b5n62l5frm";
       postPatch = /* Remove recursive import of itself */ ''
         sed -i example/main.go \
           -e '/"github.com\/rakyll\/statik\/example\/statik"/d'
  
positive.code:     version = 2;
      owner = "tidwall";
      repo = "gjson";
      date = "2017-04-05";
      rev = "01736e2fafeab19684bc0c2d1ee0a600418d7b2a";
      sha256 = "025l49xi1qil91a99griia20mg5c8xi7dv9bzi8rsg4l3ki3fq1f";
      propagatedBuildInputs = [
        match
      ];
  
negative.code: 
    gopsutil = buildFromGitHub {
      version = 2;
      rev = "v2.17.03";
      owner  = "shirou";
      repo   = "gopsutil";
      sha256 = "1dg1wr4r5dhpi5h8fjmbl3195cg395zassb7ixga84z3lvmnbqgq";
      buildInputs = [
        w32
        wmi
  