glfw: hardwire path to libGL.so.1 the intended way

GLFW provides a better way to specify the path to libGL than to patch the source code.

pkgs/development/libraries/glfw/3.x.nix

@@ -22,11 +22,11 @@ stdenv.mkDerivation rec {
   buildInputs = [ libX11 libXrandr libXinerama libXcursor libXi libXext ]
     ++ lib.optionals stdenv.isDarwin [ Cocoa Kernel ];
 
-  cmakeFlags = [ "-DBUILD_SHARED_LIBS=ON" ];
-
-  preConfigure  = lib.optional (!stdenv.isDarwin) ''
-    substituteInPlace src/glx_context.c --replace "libGL.so.1" "${lib.getLib libGL}/lib/libGL.so.1"
-  '';
+  cmakeFlags = [
+    "-DBUILD_SHARED_LIBS=ON"
+  ] ++ lib.optional (!stdenv.isDarwin) [
+    "-DCMAKE_C_FLAGS=-D_GLFW_GLX_LIBRARY='\"${lib.getLib libGL}/lib/libGL.so.1\"'"
+  ];
 
   meta = with lib; {
     description = "Multi-platform library for creating OpenGL contexts and managing input, including keyboard, mouse, joystick and time";