diff --git a/modules/system/boot/stage-2-init.sh b/modules/system/boot/stage-2-init.sh
index 55e61ffb69a..f54404ddcce 100644
--- a/modules/system/boot/stage-2-init.sh
+++ b/modules/system/boot/stage-2-init.sh
@@ -46,7 +46,7 @@ fi
 chown root:nixbld /nix/store
 chmod 1775 /nix/store
 if [ -n "@readOnlyStore@" ]; then
-    if ! mountpoint /nix/store; then
+    if ! mountpoint -q /nix/store; then
         mkdir -p /nix/rw-store
         mount --bind /nix/store /nix/store
         mount -o remount,ro,bind /nix/store