Add driver library path to some packages to find CUDA libraries.

This is to avoid relying on LD_LIBRARY_PATH for finding the CUDA driver libraries.

pkgs/development/libraries/science/math/cudnn/generic.nix

@@ -7,6 +7,7 @@
 , lib
 , cudatoolkit
 , fetchurl
+, addOpenGLRunpath
 }:
 
 stdenv.mkDerivation rec {
@@ -19,6 +20,8 @@ stdenv.mkDerivation rec {
     inherit sha256;
   };
 
+  nativeBuildInputs = [ addOpenGLRunpath ];
+
   installPhase = ''
     function fixRunPath {
       p=$(patchelf --print-rpath $1)
@@ -31,6 +34,12 @@ stdenv.mkDerivation rec {
     cp -a lib64 $out/lib64
   '';
 
+  # Set RUNPATH so that libcuda in /run/opengl-driver(-32)/lib can be found.
+  # See the explanation in addOpenGLRunpath.
+  postFixup = ''
+    addOpenGLRunpath $out/lib/lib*.so
+  '';
+
   propagatedBuildInputs = [
     cudatoolkit
   ];