diff --git a/nixos/modules/system/boot/loader/generic-extlinux-compatible/extlinux-conf-builder.sh b/nixos/modules/system/boot/loader/generic-extlinux-compatible/extlinux-conf-builder.sh
index 8f2a496de8b..9f32dbcce1a 100644
--- a/nixos/modules/system/boot/loader/generic-extlinux-compatible/extlinux-conf-builder.sh
+++ b/nixos/modules/system/boot/loader/generic-extlinux-compatible/extlinux-conf-builder.sh
@@ -106,9 +106,10 @@ cat > $tmpFile <<EOF
 DEFAULT nixos-default
 
 TIMEOUT $timeout
-$(addEntry $default default)
 EOF
 
+addEntry $default default >> $tmpFile
+
 # Add up to $numGenerations generations of the system profile to the menu,
 # in reverse (most recent to least recent) order.
 for generation in $(