diff --git a/nixos/modules/tasks/filesystems/zfs.nix b/nixos/modules/tasks/filesystems/zfs.nix
index 3bc05f56dc3..c8bbfe9769b 100644
--- a/nixos/modules/tasks/filesystems/zfs.nix
+++ b/nixos/modules/tasks/filesystems/zfs.nix
@@ -60,7 +60,7 @@ let
   importLib = {zpoolCmd, awkCmd, cfgZfs}: ''
     for o in $(cat /proc/cmdline); do
       case $o in
-        zfs_force|zfs_force=1)
+        zfs_force|zfs_force=1|zfs_force=y)
           ZFS_FORCE="-f"
           ;;
       esac