deploy-local: Allow not using substituters

flake.nix

@@ -110,9 +110,18 @@
               (hostname: machine: pkgs.writeShellScript "deploy-local-${hostname}" ''
                 set -euo pipefail
 
+                SUBSTITUTE="-s"
+                for i in "$@"; do
+                  case $i in
+                    -S)
+                    SUBSTITUTE=""
+                    ;;
+                  esac
+                done
+
                 closure="$(nix build -L --print-out-paths .#nixosConfigurations.${hostname}.config.system.build.toplevel)"
                 nix copy \
-                  -s \
+                  $SUBSTITUTE \
                   -L \
                   --to ssh://root@${machine.config.deployment.targetHost} \
                   "$closure"