diff --git a/.cargo/config b/.cargo/config
index 7cb41d979a6..b4bc4418f1e 100644
--- a/.cargo/config
+++ b/.cargo/config
@@ -1,2 +1,5 @@
 [alias]
 uitest = "test --test compile-test"
+
+[build]
+rustflags = ["-Zunstable-options"]