diff --git a/bootstrap/bootstrap.go b/bootstrap/bootstrap.go
index 7465aff..8ed06d0 100644
--- a/bootstrap/bootstrap.go
+++ b/bootstrap/bootstrap.go
@@ -760,6 +760,7 @@ func (s *singleton) GenerateBuildActions(ctx blueprint.SingletonContext) {
 			Rule:      generateBuildNinja,
 			Outputs:   i.Outputs,
 			Inputs:    i.Inputs,
+			Implicits: i.Implicits,
 			OrderOnly: i.OrderOnlyInputs,
 			Args: map[string]string{
 				"builder": primaryBuilderFile,
diff --git a/bootstrap/config.go b/bootstrap/config.go
index 1d256ba..929eac5 100644
--- a/bootstrap/config.go
+++ b/bootstrap/config.go
@@ -106,6 +106,7 @@ const (
 
 type PrimaryBuilderInvocation struct {
 	Inputs          []string
+	Implicits       []string
 	OrderOnlyInputs []string
 	Outputs         []string
 	Args            []string