Split ISO config from installed hosts; auto-include gnome in generated host

scripts/install-btrfs.sh

@@ -2,10 +2,10 @@
 set -euo pipefail
 
 # Non-interactive Btrfs installer using the flake in this repo.
-# Defaults: DISK=/dev/vda HOSTNAME=nanuqsaurus
+# Defaults: DISK=/dev/vda HOSTNAME=installer
 
 DISK=${DISK:-/dev/vda}
-HOSTNAME=${HOSTNAME:-nanuqsaurus}
+HOSTNAME=${HOSTNAME:-installer}
 
 SCRIPT_DIR=$(cd -- "$(dirname "${BASH_SOURCE[0]}")" && pwd)
 REPO_ROOT=$(cd -- "${SCRIPT_DIR}/.." && pwd)
@@ -55,6 +55,7 @@ if [ ! -e "${host_file}" ]; then
   imports = [
     inputs.lix-module.nixosModules.lixFromNixpkgs
     ../modules/system/base.nix
+    ../modules/desktop/gnome-minimal.nix
     ../modules/users/admin.nix
     ./${HOSTNAME}-hardware.nix
   ];