conky: enable nvidia support

pkgs/os-specific/linux/conky/default.nix

@@ -26,6 +26,7 @@
 , toluapp ? null
 
 , wirelessSupport     ? true      , wirelesstools ? null
+, nvidiaSupport       ? true      , libXNVCtrl ? null
 
 , curlSupport         ? true      , curl ? null
 , rssSupport          ? curlSupport
@@ -52,6 +53,7 @@ assert luaCairoSupport || luaImlib2Support
                            -> lua.luaversion == "5.1";
 
 assert wirelessSupport     -> wirelesstools != null;
+assert nvidiaSupport       -> libXNVCtrl != null;
 
 assert curlSupport         -> curl != null;
 assert rssSupport          -> curlSupport && libxml2 != null;
@@ -100,6 +102,7 @@ stdenv.mkDerivation rec {
     ++ optional  curlSupport        curl
     ++ optional  rssSupport         libxml2
     ++ optional  weatherXoapSupport libxml2
+    ++ optional  nvidiaSupport      libXNVCtrl
     ;
 
   cmakeFlags = []
@@ -118,6 +121,7 @@ stdenv.mkDerivation rec {
     ++ optional weatherMetarSupport "-DBUILD_WEATHER_METAR=ON"
     ++ optional weatherXoapSupport  "-DBUILD_WEATHER_XOAP=ON"
     ++ optional wirelessSupport     "-DBUILD_WLAN=ON"
+    ++ optional nvidiaSupport       "-DBUILD_NVIDIA=ON"
     ;
 
   meta = with stdenv.lib; {

pkgs/top-level/all-packages.nix

@@ -11756,6 +11756,7 @@ with pkgs;
 
   conky = callPackage ../os-specific/linux/conky ({
     lua = lua5_1; # conky can use 5.2, but toluapp can not
+    libXNVCtrl = linuxPackages.nvidia_x11.settings.libXNVCtrl;
   } // config.conky or {});
 
   conntrack_tools = callPackage ../os-specific/linux/conntrack-tools { };