nixos/no-x-libs: use libva-minimal

The primary difference between the standard and minimal variants of
this package is that all the X libraries are removed from the minimal
variant.

I had to switch the order of the definitions in all-packages.nix to
avoid an infinite recursion after the overlay was applied.

nixos/modules/config/no-x-libs.nix

@@ -31,6 +31,7 @@ with lib;
       cairo = super.cairo.override { x11Support = false; };
       dbus = super.dbus.override { x11Support = false; };
       gobject-introspection = super.gobject-introspection.override { x11Support = false; };
+      libva = super.libva-minimal;
       networkmanager-fortisslvpn = super.networkmanager-fortisslvpn.override { withGnome = false; };
       networkmanager-iodine = super.networkmanager-iodine.override { withGnome = false; };
       networkmanager-l2tp = super.networkmanager-l2tp.override { withGnome = false; };

pkgs/top-level/all-packages.nix

@@ -20160,8 +20160,8 @@ with pkgs;
     withUtils = false;
   });
 
-  libva = callPackage ../development/libraries/libva { };
-  libva-minimal = libva.override { minimal = true; };
+  libva-minimal = callPackage ../development/libraries/libva { minimal = true; };
+  libva = libva-minimal.override { minimal = false; };
   libva-utils = callPackage ../development/libraries/libva/utils.nix { };
 
   libva1 = callPackage ../development/libraries/libva/1.nix { };