diff --git a/browser/themes/moz.build b/browser/themes/moz.build
index 1aaa47b8e5bc..e6d41a220b8f 100644
--- a/browser/themes/moz.build
+++ b/browser/themes/moz.build
@@ -15,3 +15,12 @@ elif toolkit in ('gtk2', 'gtk3'):
     DIRS += ['linux']
 else:
     DIRS += ['windows']
+
+with Files('osx/**'):
+    SCHEDULES.exclusive = ['macosx']
+
+with Files('linux/**'):
+    SCHEDULES.exclusive = ['linux']
+
+with Files('windows/**'):
+    SCHEDULES.exclusive = ['windows']
diff --git a/mobile/android/moz.build b/mobile/android/moz.build
index 58294eb53187..439e6764282d 100644
--- a/mobile/android/moz.build
+++ b/mobile/android/moz.build
@@ -6,6 +6,7 @@
 
 with Files('**'):
     BUG_COMPONENT = ('Firefox for Android', 'Build Config & IDE Support')
+    SCHEDULES.exclusive = ['android']
 
 with Files('bouncer/**'):
     BUG_COMPONENT = ('Firefox for Android', 'Distributions')
diff --git a/moz.build b/moz.build
index 01180f57938b..d1528608aeef 100644
--- a/moz.build
+++ b/moz.build
@@ -36,6 +36,7 @@ with Files('GNUmakefile'):
 
 with Files('*gradle*'):
     BUG_COMPONENT = ('Firefox for Android', 'Build Config & IDE Support')
+    SCHEDULES.exclusive = ['android']
 
 with Files('**/l10n.toml'):
     BUG_COMPONENT = ('Core', 'Localization')