Fix odyssey nix store

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/d4b5a67bbe9ef750bd2fdffd4cad400dd5553af8' (2023-11-14)
  → 'github:NixOS/nixpkgs/9fb122519e9cd465d532f736a98c1e1eb541ef6f' (2023-11-16)

flake.lock

@@ -39,11 +39,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1699994397,
+        "lastModified": 1700097215,
-        "narHash": "sha256-xxNeIcMNMXH2EA9IAX6Cny+50mvY22LhIBiGZV363gc=",
+        "narHash": "sha256-ODQ3gBTv1iHd7lG21H+ErVISB5wVeOhd/dEogOqHs/I=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "d4b5a67bbe9ef750bd2fdffd4cad400dd5553af8",
+        "rev": "9fb122519e9cd465d532f736a98c1e1eb541ef6f",
         "type": "github"
       },
       "original": {

hosts/odyssey/hardware-configuration.nix

@@ -44,6 +44,11 @@ in {
       fsType = "zfs";
     };
 
+  fileSystems."/nix" =
+    { device = "rpool/local/nix";
+      fsType = "zfs";
+    };
+
   fileSystems."/tmp" =
     { device = "rpool/local/tmp";
       fsType = "zfs";