Added minimal zfs config

Still want to add an option for zfs on root later on.

modules/system/zfs/default.nix

@@ -0,0 +1,22 @@
+{
+  options,
+  config,
+  pkgs,
+  lib,
+  ...
+}:
+with lib; let
+  cfg = config.aa.system.zfs;
+in {
+  options.aa.system.zfs = with types; {
+    enable = mkEnableOption "zfs";
+    # TODO: Introduce a zfsOnRoot option
+  };
+
+  config = mkIf cfg.enable {
+    services.zfs = {
+      autoScrub.enable = true;
+      autoSnapshot.enable = true;
+    };
+  };
+}

systems/x86_64-linux/carbon/default.nix

@@ -32,6 +32,8 @@
     };
 
     hardware.audio.enable = true;
+
+    system.zfs.enable = true;
   };
 
   networking = {

systems/x86_64-linux/carbon/zfs.nix

@@ -54,9 +54,4 @@
     ];
   };
   users.users.root.initialHashedPassword = "$6$VOzIHqv12iJGQIFl$NQf1GeiGhtdLfZFmtZl4vab.xvtVvI7.5ty9zbMFI2dpmHoFdc6XnGwTlClVe./CbcrsQjtPpt7NKf0dNttcw.";
-
-  services.zfs = {
-    autoScrub.enable = true;
-    autoSnapshot.enable = true;
-  };
 }

systems/x86_64-linux/gospel/default.nix

@@ -39,6 +39,8 @@
     };
 
     hardware.audio.enable = true;
+
+    system.zfs.enable = true;
   };
 
   boot.binfmt.emulatedSystems = ["aarch64-linux" "armv6l-linux"];