anchor.diff:  , librsvg
   , libxml2
   , desktop-file-utils
  -, guile
  +, guile_3_0
   , libcanberra-gtk3
   , ninja
   , appstream-glib
  
positive.code:   buildInputs = [
      gtk3
      librsvg
      guile
      libcanberra-gtk3
    ];
  
  
negative.code: { stdenv
  , lib
  , fetchFromGitLab
  , nix-update-script
  , pkg-config
  