anchor.diff:      owner = "javalib-team";
       repo = pname;
       rev = version;
  -    sha256 = "sha256:0k51rscs9mdgpg3qn4cahql5ncdvlb207m015hr8v6r1vfgn0ddq";
  +    sha256 = "sha256-1aKkRZDuLJLmDhUC1FXnn4QrgXaTyAbnXfTOAdnKgs8=";
     };
   
     nativeBuildInputs = [ which ocaml findlib ];
  
positive.code: 
  let
    pname = "sawja";
    version = "1.5.10";
    webpage = "http://sawja.inria.fr/";
  in
  
  if !lib.versionAtLeast ocaml.version "4.07"
  
negative.code: 
    meta = with lib; {
      description = "A library written in OCaml, relying on Javalib to provide a high level representation of Java bytecode programs";
      homepage = "http://sawja.inria.fr/";
      license = licenses.gpl3Plus;
      maintainers = [ maintainers.vbgl ];
      platforms = ocaml.meta.platforms or [];
  