diff --git a/src/os/env.go b/src/os/env.go
index 3a250df0..694056a9 100644
--- a/src/os/env.go
+++ b/src/os/env.go
@@ -3,3 +3,7 @@ package os
 func Getenv(key string) string {
 	return ""
 }
+
+func LookupEnv(key string) (string, bool) {
+	return "", false
+}