--- a/mozilla/b2g_config.py
+++ b/mozilla/b2g_config.py
@@ -460,16 +460,17 @@ PLATFORM_VARS = {
         'base_name': 'Linux x86-64 Mulet %(branch)s',
         'slaves': SLAVES['mock'],
         'mozconfig': 'in_tree',
         'src_mozconfig': 'b2g/dev/config/mozconfigs/linux64/mulet',
         'builds_before_reboot': b2g_localconfig.BUILDS_BEFORE_REBOOT,
         'platform_objdir': OBJDIR,
         'stage_product': 'b2g',
         'stage_platform': 'linux64-mulet',
+        'enable_shared_checkouts': True,
         'env': {
             'DISPLAY': ':2',
             'HG_SHARE_BASE_DIR': '/builds/hg-shared',
             'TOOLTOOL_CACHE': '/builds/tooltool_cache',
             'TOOLTOOL_HOME': '/builds',
             'MOZ_OBJDIR': OBJDIR,
             'CCACHE_DIR': '/builds/ccache',
             'CCACHE_COMPRESS': '1',