onnxruntime cuda support fix dlopen path

onnxruntime loads some libraries at runtime with dlopen, and needs to
know where in the nix store to look for them.

pkgs/development/libraries/onnxruntime/default.nix

@@ -229,6 +229,11 @@ effectiveStdenv.mkDerivation rec {
   postPatch = ''
     substituteInPlace cmake/libonnxruntime.pc.cmake.in \
       --replace-fail '$'{prefix}/@CMAKE_INSTALL_ @CMAKE_INSTALL_
+
+    # https://github.com/microsoft/onnxruntime/blob/c4f3742bb456a33ee9c826ce4e6939f8b84ce5b0/onnxruntime/core/platform/env.h#L249
+    substituteInPlace onnxruntime/core/platform/env.h --replace-fail \
+      "GetRuntimePath() const { return PathString(); }" \
+      "GetRuntimePath() const { return PathString(\"$out/lib/\"); }"
   '' + lib.optionalString (effectiveStdenv.hostPlatform.system == "aarch64-linux") ''
     # https://github.com/NixOS/nixpkgs/pull/226734#issuecomment-1663028691
     rm -v onnxruntime/test/optimizer/nhwc_transformer_test.cc