--- a/mozilla/config.py
+++ b/mozilla/config.py
@@ -956,17 +956,17 @@ PLATFORM_VARS = {
             'platform_objdir': OBJDIR,
             'stage_product': 'firefox',
             'stage_platform': 'win64-debug',
             'enable_shared_checkouts': True,
             'env': {
                 'MOZ_OBJDIR': OBJDIR,
                 'XPCOM_DEBUG_BREAK': 'stack-and-abort',
                 'MOZ_CRASHREPORTER_NO_REPORT': '1',
-                'HG_SHARE_BASE_DIR': 'e:/builds/hg-shared',
+                'HG_SHARE_BASE_DIR': 'c:/builds/hg-shared',
                 'BINSCOPE': 'C:\Program Files (x86)\Microsoft\SDL BinScope\BinScope.exe',
                 'PATH': "${MOZILLABUILD}nsis-2.46u;${MOZILLABUILD}python27;${MOZILLABUILD}buildbotve\\scripts;${PATH}",
             },
             'enable_unittests': False,
             'enable_checktests': True,
             'talos_masters': None,
             'nightly_signing_servers': 'dep-signing',
             'dep_signing_servers': 'dep-signing',