nixpkgs/pkgs/development/libraries/libosinfo/osinfo-db-data-dir.patch

--- a/osinfo/osinfo_loader.c
+++ b/osinfo/osinfo_loader.c
@@ -2304,7 +2304,7 @@
     } else {
         path = g_getenv("OSINFO_SYSTEM_DIR");
         if (!path)
-            path = DATA_DIR "/osinfo";
+            path = "@OSINFO_DB_DATA_DIR@/osinfo";
 
         file = g_file_new_for_path(path);
     }