anchor.diff: -{ lib, stdenv
  +{ stdenv
  +, lib
   , ctags
  +, cmark
   , appstream-glib
   , desktop-file-utils
  -, docbook_xsl
  -, docbook_xml_dtd_43
   , fetchurl
   , flatpak
   , gnome
   , libgit2-glib
  +, gi-docgen
   , gobject-introspection
   , glade
   , gspell
  -, gtk-doc
   , gtk3
   , gtksourceview4
   , json-glib
  
positive.code: 
    buildInputs = [
      ctags
      flatpak
      gnome.devhelp
      glade
  
negative.code: 
  stdenv.mkDerivation rec {
    pname = "gnome-builder";
    version = "41.1";
  
    outputs = [ "out" "devdoc" ];
  
    src = fetchurl {
      url = "mirror://gnome/sources/${pname}/${lib.versions.major version}/${pname}-${version}.tar.xz";
      sha256 = "XVXkqqKkdYpGJj0cf9AJyz20RV4O1/nkTDoWNIYfo4o=";
    };
  
    nativeBuildInputs = [
      appstream-glib
      desktop-file-utils
      gi-docgen
      gobject-introspection
      meson
      ninja
      pkg-config
  