anchor.diff:      inherit (param) sha256;
     };
   
  -  buildInputs = [ ocaml findlib ounit topkg ];
  +  buildInputs = [ ocaml findlib ocamlbuild ounit topkg ];
     propagatedBuildInputs = [ result cstruct zarith ] ++ param.propagatedBuildInputs;
   
     buildPhase = "${topkg.run} build --tests true";
  
positive.code: { stdenv, buildOcaml, fetchFromGitHub, ocaml, findlib
  , cstruct, zarith, ounit, result, topkg, ptime
  }:
  
  
negative.code:   } else {
      version = "0.1.3";
      sha256 = "0hpn049i46sdnv2i6m7r6m6ch0jz8argybh71wykbvcqdby08zxj";
      propagatedBuildInputs = [ ];
    };
  in
  
  stdenv.mkDerivation rec {
    name = "ocaml${ocaml.version}-asn1-combinators-${version}";
    inherit (param) version;
  
    src = fetchFromGitHub {
      owner  = "mirleft";
  