diff --git a/system/common.nix b/system/common.nix
index d8d152a..4e7f839 100644
--- a/system/common.nix
+++ b/system/common.nix
@@ -78,11 +78,18 @@
       options = "--delete-older-than 30d";
     };
 
-    # enable flakes!
-    settings.experimental-features = [
-      "nix-command"
-      "flakes"
-    ];
+    settings = {
+      # enable flakes!
+      experimental-features = [
+        "nix-command"
+        "flakes"
+      ];
+
+      # Use muffin server as a binary cache
+      substituters = [ "https://nix-cache.sigkill.computer" ];
+      trusted-public-keys = [ "nix-cache.sigkill.computer-1:ONtQC9gUjL+2yNgMWB68NudPySXhyzJ7I3ra56/NPgk=" ];
+      netrc-file = "${./secrets/nix-cache-netrc}";
+    };
   };
 
   # kernel options
diff --git a/system/secrets/nix-cache-netrc b/system/secrets/nix-cache-netrc
new file mode 100644
index 0000000..cee0ea5
Binary files /dev/null and b/system/secrets/nix-cache-netrc differ