diff --git a/sweet/harnesses/go-build.go b/sweet/harnesses/go-build.go
index 3b3e278..33cc67b 100644
--- a/sweet/harnesses/go-build.go
+++ b/sweet/harnesses/go-build.go
@@ -93,7 +93,7 @@
 		return fmt.Errorf("error copying GOROOT: %v", err)
 	}
 	cfg.GoRoot = goroot
-	if err := cfg.GoTool().Do("install", "cmd/compile", "cmd/link"); err != nil {
+	if err := cfg.GoTool().Do("", "install", "cmd/compile", "cmd/link"); err != nil {
 		return fmt.Errorf("error building cmd/compile and cmd/link: %v", err)
 	}