anchor.diff:      "--disable-tests"
       "--disable-necko-wifi" # maybe we want to enable this at some point
       "--disable-updater"
  -    "--enable-jemalloc"
       "--enable-default-toolkit=${default-toolkit}"
       "--with-libclang-path=${llvmPackages.libclang.lib}/lib"
       "--with-system-nspr"
  
positive.code:   ++ lib.optional  gssSupport libkrb5
    ++ lib.optionals waylandSupport [ libxkbcommon libdrm ]
    ++ lib.optional  pipewireSupport pipewire
    ++ lib.optional  (lib.versionAtLeast version "82") gnum4
    ++ lib.optionals buildStdenv.isDarwin [ CoreMedia ExceptionHandling Kerberos
                                            AVFoundation MediaToolbox CoreLocation
  
negative.code: , yasm, libGLU, libGL, sqlite, unzip, makeWrapper
  , hunspell, libevent, libstartup_notification
  , libvpx_1_8
  , icu69, libpng, glib, pciutils
  , autoconf213, which, gnused, rustPackages, rustPackages_1_45
  , rust-cbindgen, nodejs, nasm, fetchpatch
  , gnum4
  