anchor.diff:  
     teleport = buildFromGitHub {
       version = 2;
  -    rev = "v1.2.6";
  +    rev = "v1.3.0";
       owner = "gravitational";
       repo = "teleport";
  -    sha256 = "1v6xlphqhpib6r05fk9zzh5i6iskdp0996p4vvmxf6an58pk5sf1";
  +    sha256 = "01vhxl6i0q06xdc3bxqwy1jkk7iq6hz7rs2l4836pcfih6hiy1b2";
       buildInputs = [
         bolt
         configure
  
positive.code: 
    roaring = buildFromGitHub {
      version = 2;
      rev = "v0.3.0";
      owner  = "RoaringBitmap";
      repo   = "roaring";
      sha256 = "0hjzbwaqm0vqv8fi9am1spkilfaqgzvhiasdjpmz4nhi95if0jzs";
      propagatedBuildInputs = [
        go-unsnap-stream
        msgp
  
negative.code:     version = 2;
      owner = "spf13";
      repo = "hugo";
      rev = "v0.18";
      sha256 = "0smgfj1lzj11h4238fwyhx87l9rp4wxz4yhkqn5bwz26ha3zs0hl";
      buildInputs = [
        ace
        afero
  