error: environment variable `MOZ_TOPOBJDIR` not defined
  --> modules/libpref/init/static_prefs/src/lib.rs:11:18
   |
11 | include!(concat!(env!("MOZ_TOPOBJDIR"), "/modules/libpref/static_prefs.rs"));
   |                  ^^^^^^^^^^^^^^^^^^^^^

error: aborting due to previous error

error: Could not compile `static_prefs`.