nixpkgs/pkgs/servers/uhub/plugin-dir.patch

--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -241,8 +241,14 @@
 
 if (UNIX)
 	install( TARGETS uhub uhub-passwd RUNTIME DESTINATION bin )
-	install( TARGETS mod_example mod_welcome mod_logging mod_auth_simple mod_auth_sqlite mod_chat_history mod_chat_history_sqlite mod_chat_only mod_topic mod_no_guest_downloads DESTINATION /usr/lib/uhub/ OPTIONAL )
-	install( FILES ${CMAKE_SOURCE_DIR}/doc/uhub.conf ${CMAKE_SOURCE_DIR}/doc/plugins.conf ${CMAKE_SOURCE_DIR}/doc/rules.txt ${CMAKE_SOURCE_DIR}/doc/motd.txt DESTINATION /etc/uhub OPTIONAL )
+
+    set( PLUGINS mod_example mod_welcome mod_logging mod_auth_simple mod_auth_sqlite mod_chat_history mod_chat_only mod_topic mod_no_guest_downloads )
+
+    foreach( PLUGIN ${PLUGINS} )
+        install( TARGETS ${PLUGIN} DESTINATION $ENV{${PLUGIN}} OPTIONAL )
+    endforeach( PLUGIN )
+
+	install( FILES ${CMAKE_SOURCE_DIR}/doc/uhub.conf ${CMAKE_SOURCE_DIR}/doc/plugins.conf ${CMAKE_SOURCE_DIR}/doc/rules.txt ${CMAKE_SOURCE_DIR}/doc/motd.txt DESTINATION doc/ OPTIONAL )
 endif()