Define V8_BASE

common.gypi

@@ -27,6 +27,7 @@
     'uv_library': 'static_library',
     'uv_parent_path': 'vendor/node/deps/uv',
     'uv_use_dtrace': 'false',
+    'V8_BASE': '',
     'v8_postmortem_support': 'false',
     'v8_enable_i18n_support': 'false',
     # Required by Linux (empty for now, should support it in future).