diff --git a/CMakeLists.txt b/CMakeLists.txt
index a20ebde80..a7cb3f859 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,7 +2,11 @@
 # SPDX-License-Identifier: BSL-1.0
 
 cmake_minimum_required(VERSION 3.10.2)
-project(XRT VERSION 21.0.0)
+project(
+	XRT
+	VERSION 21.0.0
+	LANGUAGES C CXX
+	)
 
 # CMake 3.11 introduced CMP0072 - Prefer GLVND
 if(POLICY CMP0072)
diff --git a/src/xrt/targets/openxr/active_runtime.cmake b/src/xrt/targets/openxr/active_runtime.cmake
index 336bc84d8..d3b2ca615 100644
--- a/src/xrt/targets/openxr/active_runtime.cmake
+++ b/src/xrt/targets/openxr/active_runtime.cmake
@@ -1,21 +1,22 @@
 # Copyright 2019, Benjamin Saunders <ben.e.saunders@gmail.com>
+# Copyright 2019-2023, Collabora, Ltd.
 # SPDX-License-Identifier: BSL-1.0
 
-include(GNUInstallDirs)
-
 set(MANIFEST_RELATIVE_DIR @MANIFEST_RELATIVE_DIR@)
 set(XR_API_MAJOR @XR_API_MAJOR@)
 set(RUNTIME_TARGET @RUNTIME_TARGET@)
+set(CURRENT_BIN_DIR @CMAKE_CURRENT_BINARY_DIR@)
+set(CMAKE_INSTALL_SYSCONFDIR @CMAKE_INSTALL_SYSCONFDIR@)
 
-execute_process(COMMAND ${CMAKE_COMMAND} -E rm -f ${CMAKE_BINARY_DIR}/active_runtime.json)
+execute_process(COMMAND "${CMAKE_COMMAND}" -E rm -f "${CURRENT_BIN_DIR}/active_runtime.json")
 execute_process(
 	COMMAND
-		${CMAKE_COMMAND} -E create_symlink
-		${CMAKE_INSTALL_PREFIX}/${MANIFEST_RELATIVE_DIR}/${RUNTIME_TARGET}.json
-		${CMAKE_BINARY_DIR}/active_runtime.json
+		"${CMAKE_COMMAND}" -E create_symlink
+		"${CMAKE_INSTALL_PREFIX}/${MANIFEST_RELATIVE_DIR}/${RUNTIME_TARGET}.json"
+		"${CURRENT_BIN_DIR}/active_runtime.json"
 	)
 file(
 	INSTALL
-	DESTINATION "${CMAKE_INSTALL_FULL_SYSCONFDIR}/xdg/openxr/${XR_API_MAJOR}"
-	TYPE FILE FILES "${CMAKE_BINARY_DIR}/active_runtime.json"
+	DESTINATION "/${CMAKE_INSTALL_SYSCONFDIR}/xdg/openxr/${XR_API_MAJOR}"
+	TYPE FILE FILES "${CURRENT_BIN_DIR}/active_runtime.json"
 	)