xf86-video-intel: build intel-virtual-output

pkgs/servers/x11/xorg/default.nix

@@ -1821,7 +1821,6 @@ let
     };
     buildInputs = [pkgconfig dri2proto dri3proto fontsproto libdrm libpng udev libpciaccess presentproto randrproto renderproto libX11 xcbutil libxcb libXcursor libXdamage libXext xextproto xf86driproto libXfixes xorgserver xproto libXrandr libXrender libxshmfence libXtst libXvMC ];
     meta.platforms = stdenv.lib.platforms.unix;
-    configureFlags = "--with-default-dri=3";
   }) // {inherit dri2proto dri3proto fontsproto libdrm libpng udev libpciaccess presentproto randrproto renderproto libX11 xcbutil libxcb libXcursor libXdamage libXext xextproto xf86driproto libXfixes xorgserver xproto libXrandr libXrender libxshmfence libXtst libXvMC ;};
 
   xf86videomach64 = (mkDerivation "xf86videomach64" {

pkgs/servers/x11/xorg/overrides.nix

@@ -565,8 +565,9 @@ in
   };
 
   xf86videointel = attrs: attrs // {
-    buildInputs = attrs.buildInputs ++ [xorg.libXfixes];
+    buildInputs = attrs.buildInputs ++ [xorg.libXfixes xorg.libXScrnSaver xorg.pixman];
     nativeBuildInputs = [args.autoreconfHook xorg.utilmacros];
+    configureFlags = "--with-default-dri=3 --enable-tools";
   };
 
   xf86videoxgi = attrs: attrs // {