Fix bugs

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

hosts/common/system/configs/nix-cleanup/cleanup.sh

@@ -16,8 +16,13 @@ if [[ -e /mnt/btrfs && -n $(mountpoint -q /mnt/btrfs) ]]; then
   exit 1
 fi
 
+if [[ -z "$DEVICE" ]]; then
+  echo "Error: DEVICE variable is not set."
+  exit 1
+fi
+
 mkdir -p /mnt/btrfs
-mount /dev/mapper/luks /mnt/btrfs
+mount "/dev/mapper/$DEVICE" /mnt/btrfs
 
 if [[ -e /mnt/btrfs/@.bak ]]; then
   if [[ -n "$(ls -A /mnt/btrfs/@.bak)" ]]; then

hosts/common/system/configs/nix-cleanup/default.nix

@@ -1,4 +1,4 @@
-{ pkgs, ... }:
+{ config, pkgs, ... }:
 {
   environment.systemPackages = [
     (pkgs.writeShellApplication {
@@ -10,6 +10,7 @@
         btrfs-progs
         nix
       ];
+      runtimeEnv.DEVICE = config.environment.impermanence.device;
       text = builtins.readFile ./cleanup.sh;
     })
   ];