mono46, mono48: disable parallel building

See #32386
mono46: https://hydra.nixos.org/build/65617511
mono48: https://hydra.nixos.org/build/65600645

pkgs/development/compilers/mono/generic.nix

@@ -4,7 +4,7 @@
 
 , version, sha256
 , withLLVM ? false
-, buildParallel ? true
+, enableParallelBuilding ? true
 }:
 
 let
@@ -47,8 +47,6 @@ stdenv.mkDerivation rec {
   # The file /nix/store/xxx-mono-2.4.2.1/lib/mscorlib.dll is an invalid CIL image
   dontStrip = true;
 
-  enableParallelBuilding = buildParallel;
-
   # We want pkg-config to take priority over the dlls in the Mono framework and the GAC
   # because we control pkg-config
   patches = [ ./pkgconfig-before-gac.patch ];
@@ -85,6 +83,8 @@ stdenv.mkDerivation rec {
     ln -s $out/bin/mcs $out/bin/gmcs
   '';
 
+  inherit enableParallelBuilding;
+
   meta = {
     homepage = http://mono-project.com/;
     description = "Cross platform, open source .NET development framework";