diff --git a/dashboard/builder/env.go b/dashboard/builder/env.go
index 34a40bd5..72612290 100644
--- a/dashboard/builder/env.go
+++ b/dashboard/builder/env.go
@@ -284,6 +284,7 @@ func extraEnv() []string {
 	extra := []string{
 		"GOARM",
 		"GO386",
+		"GOROOT_BOOTSTRAP", // See https://golang.org/s/go15bootstrap
 		"CGO_ENABLED",
 		"CC",
 		"CC_FOR_TARGET",