diff --git a/release.nix b/release.nix
index 1cd074187f..b957f1c672 100644
--- a/release.nix
+++ b/release.nix
@@ -1,7 +1,7 @@
 # 'supportedSystems' restricts the set of systems that we will evaluate for. Useful when you're evaluating
 # on a machine with e.g. no way to build the Darwin IFDs you need!
 { supportedSystems ? [ "x86_64-linux" "x86_64-darwin" ]
-, ifdLevel ? 0
+, ifdLevel ? 1
 , checkMaterialization ? false }:
 
 let