diff --git a/modules/age.nix b/modules/age.nix
index 422346e..3770250 100644
--- a/modules/age.nix
+++ b/modules/age.nix
@@ -23,6 +23,7 @@ with lib; let
     if isDarwin then ''
       if ! diskutil info "${cfg.secretsMountPoint}" &> /dev/null; then
           dev=$(hdiutil attach -nomount ram://1MiB)
+          newfs_hfs -v agenix "$dev"
           mount -t hfs -o nobrowse,nodev,nosuid,-m=0751 "$dev" "${cfg.secretsMountPoint}"
       fi
     ''