diff --git a/hosts/karasumaru/configuration.nix b/hosts/karasumaru/configuration.nix
index 71c482f..b797e50 100644
--- a/hosts/karasumaru/configuration.nix
+++ b/hosts/karasumaru/configuration.nix
@@ -37,6 +37,8 @@ in {
     };
   };
 
+  nix.settings.experimental-features = ["nix-command" "flakes"];
+
   virtualisation.docker.enable = true;
   virtualisation.oci-containers = {
     backend = "docker";
diff --git a/hosts/karasumaru/hardware-configuration.nix b/hosts/karasumaru/hardware-configuration.nix
index d6e0a14..8ef576b 100644
--- a/hosts/karasumaru/hardware-configuration.nix
+++ b/hosts/karasumaru/hardware-configuration.nix
@@ -28,7 +28,12 @@
     options = ["fmask=0022" "dmask=0022"];
   };
 
-  swapDevices = [];
+  swapDevices = [
+    {
+      device = "/var/lib/swapfile";
+      size = 2 * 1024; # swap size is in mb
+    }
+  ];
 
   # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
   # (the default) this is the recommended approach. When using systemd-networkd it's
diff --git a/hosts/saberofxebec/configuration.nix b/hosts/saberofxebec/configuration.nix
index 394f93b..2217fcb 100644
--- a/hosts/saberofxebec/configuration.nix
+++ b/hosts/saberofxebec/configuration.nix
@@ -51,33 +51,7 @@
     };
   };
 
-  # Open ports in the firewall.
-  # networking.firewall.allowedTCPPorts = [ ... ];
-  # networking.firewall.allowedUDPPorts = [ ... ];
-  # Or disable the firewall altogether.
-  # networking.firewall.enable = false;
+  nix.settings.experimental-features = ["nix-command" "flakes"];
 
-  # Copy the NixOS configuration file and link it from the resulting system
-  # (/run/current-system/configuration.nix). This is useful in case you
-  # accidentally delete configuration.nix.
-  # system.copySystemConfiguration = true;
-
-  # This option defines the first version of NixOS you have installed on this particular machine,
-  # and is used to maintain compatibility with application data (e.g. databases) created on older NixOS versions.
-  #
-  # Most users should NEVER change this value after the initial install, for any reason,
-  # even if you've upgraded your system to a new NixOS release.
-  #
-  # This value does NOT affect the Nixpkgs version your packages and OS are pulled from,
-  # so changing it will NOT upgrade your system - see https://nixos.org/manual/nixos/stable/#sec-upgrading for how
-  # to actually do that.
-  #
-  # This value being lower than the current NixOS release does NOT mean your system is
-  # out of date, out of support, or vulnerable.
-  #
-  # Do NOT change this value unless you have manually inspected all the changes it would make to your configuration,
-  # and migrated your data accordingly.
-  #
-  # For more information, see `man configuration.nix` or https://nixos.org/manual/nixos/stable/options#opt-system.stateVersion .
   system.stateVersion = "24.11"; # Did you read the comment?
 }