diff --git a/common/flakes.nix b/common/flakes.nix
index aa60c1e..6927fb8 100644
--- a/common/flakes.nix
+++ b/common/flakes.nix
@@ -1,10 +1,18 @@
 { pkgs, ... }:
 
-{
-  nix = {
-    package = pkgs.nixFlakes;
-    extraOptions = ''
-      experimental-features = nix-command flakes
-    '';
+let
+  cfg = config.nix.flakes;
+in {
+  options.nix.flakes = {
+    enable = mkEnableOption "use nix flakes";
+  };
+
+  config = mkIf cfg.enable {
+    nix = {
+      package = pkgs.nixFlakes;
+      extraOptions = ''
+        experimental-features = nix-command flakes
+      '';
+    };
   };
 }
diff --git a/machines/mitty/configuration.nix b/machines/mitty/configuration.nix
index d0fbbec..da38ea2 100644
--- a/machines/mitty/configuration.nix
+++ b/machines/mitty/configuration.nix
@@ -21,4 +21,6 @@
 
   security.acme.acceptTerms = true;
   security.acme.email = "letsencrypt+5@tar.ninja";
+
+  nix.flakes.enable = true;
 }
diff --git a/machines/nanachi/configuration.nix b/machines/nanachi/configuration.nix
index a915a84..fb0ab35 100644
--- a/machines/nanachi/configuration.nix
+++ b/machines/nanachi/configuration.nix
@@ -22,6 +22,8 @@
   security.acme.acceptTerms = true;
   security.acme.email = "letsencrypt+5@tar.ninja";
 
+  nix.flakes.enable = true;
+
   services.nginx.virtualHosts."nanachi.neet.dev" = {
     enableACME = true;
     forceSSL = true;
diff --git a/machines/neet.dev/configuration.nix b/machines/neet.dev/configuration.nix
index c1d9753..df920f2 100644
--- a/machines/neet.dev/configuration.nix
+++ b/machines/neet.dev/configuration.nix
@@ -28,6 +28,8 @@
   security.acme.acceptTerms = true;
   security.acme.email = "letsencrypt+5@tar.ninja";
 
+  nix.flakes.enable = true;
+
   # tmp
   services.nginx.virtualHosts."tmp.neet.space" = {
     enableACME = true;
diff --git a/machines/reg/configuration.nix b/machines/reg/configuration.nix
index 98b9ee2..83cbd06 100644
--- a/machines/reg/configuration.nix
+++ b/machines/reg/configuration.nix
@@ -18,6 +18,8 @@
     allowDiscards = true;
   };
 
+  nix.flakes.enable = true;
+
   networking.useDHCP = false;
   networking.interfaces.enp57s0f1.useDHCP = true;
   networking.interfaces.wlp0s20f3.useDHCP = true;