treewide: remove enableParallelBuilding = true if using cmake

pkgs/tools/X11/nx-libs/default.nix

@@ -23,8 +23,6 @@ stdenv.mkDerivation rec {
   NIX_CFLAGS_COMPILE = [ "-I${libtirpc.dev}/include/tirpc" ];
   NIX_LDFLAGS = [ "-ltirpc" ];
 
-  enableParallelBuilding = true;
-
   postPatch = ''
     patchShebangs .
     find . -type f -name Makefile -exec sed -i 's|^\(SHELL:=\)/bin/bash$|\1${stdenv.shell}|g' {} \;

pkgs/tools/X11/virtualgl/lib.nix

@@ -31,8 +31,6 @@ stdenv.mkDerivation rec {
       --replace "LD_PRELOAD=libgefaker" "LD_PRELOAD=$out/lib/libgefaker"
   '';
 
-  enableParallelBuilding = true;
-
   meta = with stdenv.lib; {
     homepage = "http://www.virtualgl.org/";
     description = "X11 GL rendering in a remote computer with full 3D hw acceleration";