--- a/testing/mozharness/scripts/fx_desktop_build.py
+++ b/testing/mozharness/scripts/fx_desktop_build.py
@@ -73,18 +73,17 @@ class FxDesktopBuild(BuildScript, TryToo
                     "%(objdir)s/dist/firefox-*",
                     "%(objdir)s/dist/fennec*",
                     "%(objdir)s/dist/seamonkey*",
                     "%(objdir)s/dist/thunderbird*",
                     "%(objdir)s/dist/install/sea/*.exe"
                 ],
                 'stage_product': 'firefox',
                 'platform_supports_post_upload_to_latest': True,
-                'build_resources_path': \
-                '%(abs_src_dir)s/obj-firefox/.mozbuild/build_resources.json',
+                'build_resources_path': '%(abs_obj_dir)s/.mozbuild/build_resources.json',
                 'nightly_promotion_branches': ['mozilla-central', 'mozilla-aurora'],
 
                 # try will overwrite these
                 'clone_with_purge': False,
                 'clone_by_revision': False,
                 'tinderbox_build_dir': None,
                 'to_tinderbox_dated': True,
                 'release_to_try_builds': False,