anchor.diff:      "--enable-interpreter"
       "--disable-symbol-lookup"
       #"--enable-some-floating-point"
  -    "--with-x"
  +    "--${boolwt opengl-dummy.glx}-x"
       #(wtFlag "skia" true "yes")
       #(wtFlag "skia-build-type" true "Release")
       "--without-gallium"
  
positive.code: let
    inherit (lib)
      boolEn
      optionalString;
  in
  stdenv.mkDerivation rec {
  
negative.code: , libx11
  , libxcb
  , lzo
  , opengl-dummy
  , xorg
  , zlib
  
  