anchor.diff:        ocamlPackages.xmlm ocamlPackages.ocaml_pcre
         ocamlPackages.camomile
         ocamlPackages.fdkaac
  -      ocamlPackages.srt ocamlPackages.sedlex menhir menhirLib
  +      srt ocamlPackages.sedlex menhir menhirLib
       ];
   
     hardeningDisable = [ "format" "fortify" ];
  
positive.code: 
  # Liquidsoap 1.4.2 is not compatible with menhir ≥ 20220210
  # Locally override menhir to an earlier version
  let menhirLib = ocamlPackages.menhirLib.overrideAttrs (o: rec {
      version = "20211128";
      src = fetchFromGitLab {
        domain = "gitlab.inria.fr";
  
negative.code:     inherit menhirLib menhirSdk;
    };
  
    srt = ocamlPackages.srt.overrideAttrs (old: rec {
      version = "0.1.1";
      src = fetchFromGitHub {
        owner = "savonet";
        repo = "ocaml-srt";
        rev = "v${version}";
        sha256 = "0xh89w4j7lljvpy2n08x6m9kw88f82snmzf23kp0gw637sjnrj6f";
      };
    });
  in
  
  stdenv.mkDerivation {
  