nixpkgs/pkgs/development/libraries/qt-5/5.8/qtbase/mkspecs-libgl.patch

Index: qtbase-opensource-src-5.5.1/mkspecs/common/linux.conf
===================================================================
--- qtbase-opensource-src-5.5.1.orig/mkspecs/common/linux.conf
+++ qtbase-opensource-src-5.5.1/mkspecs/common/linux.conf
@@ -12,8 +12,8 @@ QMAKE_INCDIR            =
 QMAKE_LIBDIR            =
 QMAKE_INCDIR_X11        =
 QMAKE_LIBDIR_X11        =
-QMAKE_INCDIR_OPENGL     =
-QMAKE_LIBDIR_OPENGL     =
+QMAKE_INCDIR_OPENGL     = @mesa_inc@/include
+QMAKE_LIBDIR_OPENGL     = @mesa_lib@/lib
 QMAKE_INCDIR_OPENGL_ES2 = $$QMAKE_INCDIR_OPENGL
 QMAKE_LIBDIR_OPENGL_ES2 = $$QMAKE_LIBDIR_OPENGL
 QMAKE_INCDIR_EGL        =