Fix deprecations

modules/base.nix

@@ -1,3 +1,3 @@
 {
-  boot.cleanTmpDir = true;
+  boot.tmp.cleanOnBoot = true;
 }

modules/nix.nix

@@ -34,11 +34,13 @@ in
       "nixpkgs-overlays=${overlaysCompat}"
     ];
 
-    # sudoers are trusted nix users
-    trustedUsers = [ "@wheel" ];
+    settings = {
+      # sudoers are trusted nix users
+      trusted-users = [ "@wheel" ];
 
-    # On-the-fly optimisation of nix store
-    autoOptimiseStore = true;
+      # On-the-fly optimisation of nix store
+      auto-optimise-store = true;
+    };
 
     # less noticeable nix builds
     daemonCPUSchedPolicy = "idle";
@@ -47,7 +49,7 @@ in
   };
 
   nixpkgs.overlays = with inputs; [
-    self.overlay
+    self.overlays.default
 
     (final: prev: {
       unstable = import nixpkgs-unstable {