anchor.diff:  
     meta = with stdenv.lib; {
       description = "Bioinformatics library for Ocaml";
  -    homepage = "http://${owner}.github.io/${pname}";
  +    homepage = "http://${pname}.org";
       maintainers = [ maintainers.bcdarwin ];
       license = licenses.gpl2;
     };
  
positive.code:     inherit owner;
      repo   = pname;
      rev    = "v${version}";
      sha256 = "0dghqx6jbzihmga8jjwwavs0wqksgcns4z1nmwj0ds9ik3mcra30";
    };
  
    buildInputs = [ ppx_jane ppx_sexp_conv ];
  
negative.code: 
  buildDunePackage rec {
    pname = "biocaml";
    version = "0.10.1";
  
    owner = "biocaml";
  
  