--- a/moz.build
+++ b/moz.build
@@ -59,17 +59,16 @@ if CONFIG['ENABLE_CLANG_PLUGIN']:
     DIRS += ['build/clang-plugin']
 
 DIRS += [
     'config',
     'python',
     'taskcluster',
     'testing/mozbase',
     'third_party/python',
-    'tools',
 ]
 
 if not CONFIG['JS_STANDALONE']:
     # These python manifests are included here so they get picked up without an objdir
     PYTHON_UNITTEST_MANIFESTS += [
         'testing/marionette/harness/marionette_harness/tests/harness_unit/python.ini',
         'testing/mochitest/tests/python/python.ini',
     ]
@@ -91,16 +90,17 @@ if not CONFIG['JS_STANDALONE']:
         'source-repo.h',
     ]
 
     GENERATED_FILES['buildid.h'].script = 'build/variables.py:buildid_header'
     GENERATED_FILES['source-repo.h'].script = 'build/variables.py:source_repo_header'
 
     DIRS += [
         'build',
+        'tools',
         'probes',
     ]
 
 if CONFIG['COMPILE_ENVIRONMENT']:
     DIRS += ['js/src']
 
 DIRS += [
     'config/external/fdlibm',