Index: tools/mb/docs/design_spec.md |
diff --git a/tools/mb/docs/design_spec.md b/tools/mb/docs/design_spec.md |
index d6067dfd3c8b4a57166c71c6ba71703777c4a766..52c61559714f934b77c3800ce30fd7bf6c18b866 100644 |
--- a/tools/mb/docs/design_spec.md |
+++ b/tools/mb/docs/design_spec.md |
@@ -46,6 +46,9 @@ A config can either be specified directly (useful for testing) or by specifying |
the master name and builder name (useful on the bots so that they do not need |
to specify a config directly and can be hidden from the details). |
+MB can also be configured to take the list of GYP_DEFINES and gn args from |
+the caller if necessary, using the "passthrough" mode. |
+ |
See the [user guide](user_guide.md#mb_config.pyl) for details. |
### Handling the analyze step |