fix: work on making the installer work offline

fix: ensure system closure is installed for derivations needed by the installer

fix: build closure in build-step instead of on iso

hosts/boot.nix

@@ -34,6 +34,11 @@
           type = lib.types.str;
           description = "The main disk device to use for installation.";
         };
+        useSwap = lib.mkOption {
+          type = lib.types.bool;
+          default = true;
+          description = "Whether to create and use a swap partition.";
+        };
         swapSize = lib.mkOption {
           type = lib.types.str;
           description = "The size of the swap partition.";
@@ -115,7 +120,7 @@
               };
 
               # Swap Partition (size configurable per host)
-              swap = {
+              swap = lib.mkIf config.athenix.host.filesystem.useSwap {
                 name = "swap";
                 label = "swap";
                 size = config.athenix.host.filesystem.swapSize;