patch from https://sources.debian.org/src/direwolf/1.7+dfsg-2/debian/patches/lib-udev-rules/

Author: wb2osz

conf/CMakeLists.txt

@@ -25,8 +25,13 @@ string(REGEX REPLACE "^%C%([^\n]*)" "\\1" file_content "${file_content}")
 file(WRITE "${CMAKE_BINARY_DIR}/direwolf.conf" "${file_content}")
 
 # install udev rules for CM108
+# There are two locations.  The one in /etc/udev/rules.d is meant for local customization and
+# takes precedence for the same name.
+# https://sources.debian.org/src/direwolf/1.7+dfsg-2/debian/patches/lib-udev-rules/
+# says that we should use the /usr/lib/udev/rules.d location.
 if(LINUX)
-  install(FILES "${CUSTOM_CONF_DIR}/99-direwolf-cmedia.rules" DESTINATION /etc/udev/rules.d/)
+  #install(FILES "${CUSTOM_CONF_DIR}/99-direwolf-cmedia.rules" DESTINATION /etc/udev/rules.d/)
+  install(FILES "${CUSTOM_CONF_DIR}/99-direwolf-cmedia.rules" DESTINATION /usr/lib/udev/rules.d/)
 endif()
 
 install(FILES "${CMAKE_BINARY_DIR}/direwolf.conf" DESTINATION ${INSTALL_CONF_DIR})