nixos.system_tarball_pc: Fix evaluation

It was broken due to 57b05765c9.

ZFS requires `networking.hostId` to be set.

nixos/modules/installer/cd-dvd/installation-cd-base.nix

@@ -45,9 +45,6 @@ with lib;
   # Get a console as soon as the initrd loads fbcon on EFI boot.
   boot.initrd.kernelModules = [ "fbcon" ];
 
-  # Configure host id for ZFS to work
-  networking.hostId = "8425e349";
-
   # Allow the user to log in as root without a password.
   users.extraUsers.root.initialHashedPassword = "";
 }

nixos/modules/profiles/base.nix

@@ -54,4 +54,6 @@
   # Include support for various filesystems.
   boot.supportedFilesystems = [ "btrfs" "reiserfs" "vfat" "f2fs" "zfs" "ntfs" "cifs" ];
 
+  # Configure host id for ZFS to work
+  networking.hostId = "8425e349";
 }