anchor.diff:             --prefix "PYTHONPATH" ":" "${python}/lib/python${python.majorVersion}"
          done
       '';
  +
  +  configureFlags = "--enable-release";
   
     meta = {
       description = "Coccinelle, a program to apply C code semantic patches";
  
positive.code: 
    buildInputs = with ocamlPackages; [
      ocaml findlib menhir
      ocaml_pcre ocaml_sexplib pycaml
      python ncurses makeWrapper
    ];
  
    configureFlagsArray = [ "--enable-release" ];
  
    postInstall =
      # On non-NixOS systems, Coccinelle would end up looking up Python modules
      # in the wrong directory.
  
negative.code: { fetchurl, stdenv, python, ncurses, ocamlPackages, pkgconfig }:
  
  let
  
    name = "coccinelle-1.0.0-rc15";
    sha256 = "07fab4e17512925b958890bb13c0809797074f2e44a1107b0074bdcc156b9596";
  
  in stdenv.mkDerivation {
    inherit name;
  