diff --git a/webapp.nix b/webapp.nix
index ff0e216..1e09d1c 100644
--- a/webapp.nix
+++ b/webapp.nix
@@ -57,6 +57,9 @@ let
     # Market Configuration
     VITE_MARKET_NADDR = cfg.marketNaddr;
 
+    # Demo Mode
+    VITE_DEMO_MODE = if cfg.demoMode then "true" else "false";
+
     # Additional env vars
     NODE_ENV = "production";
 
@@ -208,6 +211,12 @@ in {
       description = "Nostr address (naddr) for the market configuration";
     };
 
+    demoMode = lib.mkOption {
+      type = lib.types.bool;
+      default = false;
+      description = "Enable demo mode with auto-generated demo accounts on the login page";
+    };
+
     enableSSL = lib.mkOption {
       type = lib.types.bool;
       default = true;