dacbert: disable smartd, fix cachefilesd /tmp access

hosts/dacbert/default.nix

@@ -210,6 +210,10 @@ in
     };
   };
 
+  # /modules/baremetal.nix assumptions that don't make sense for netboot
+  services.smartd.enable = lib.mkForce false;
+  services.fstrim.enable = lib.mkForce true;
+
   systemd = {
     services.nix-daemon.serviceConfig = {
       LimitNOFILE = lib.mkForce 8192;

modules/rpi-netboot.nix

@@ -82,4 +82,5 @@
     enable = true;
     cacheDir = "/tmp/fscache";
   };
+  systemd.services.cachefilesd.serviceConfig.PrivateTmp = lib.mkForce false;
 }