--- a/mozilla/config.py
+++ b/mozilla/config.py
@@ -2722,16 +2722,19 @@ BRANCHES['try']['platforms']['android-ap
 BRANCHES['try']['platforms']['android-api-11-debug']['slaves'] = TRY_SLAVES['mock']
 BRANCHES['try']['platforms']['android-x86']['slaves'] = TRY_SLAVES['mock']
 for platform in BRANCHES['try']['platforms'].keys():
     # Sadly, the rule that mobile builds go to /mobile/
     # isn't true for try :(
     BRANCHES['try']['platforms'][platform]['stage_product'] = 'firefox'
     # Disable symbol upload across the board
     BRANCHES['try']['platforms'][platform]['upload_symbols'] = False
+    # Disable sccache for bustage, bug 1154377
+    if 'macosxe' in platform:
+        BRANCHES['try']['platforms'][platform]['env']['SCCACHE_DISABLE'] = '1'
 
 # Enable mozharness pinning
 for _, branch in items_at_least(BRANCHES, 'gecko_version', 30):
     branch['script_repo_manifest'] = \
         "https://hg.mozilla.org/%(repo_path)s/raw-file/%(revision)s/" + \
         "testing/mozharness/mozharness.json"
 
 BRANCHES['mozilla-b2g30_v1_4']['script_repo_manifest'] = \