diff --git a/module.nix b/module.nix
index 852c12a..0fb1589 100644
--- a/module.nix
+++ b/module.nix
@@ -63,7 +63,7 @@ in {
         environment = {
           PRICEBOT_EXCHANGE_HOST = cfg.exchange-host;
           PRICEBOT_BEBOT_URL = cfg.mattermost-url;
-          PRICEBOT_BEBOT_AUTH_TOKEN_FILE = "$CREDENTIALS_DIRECTORY/auth.token";
+          PRICEBOT_BEBOT_AUTH_TOKEN_FILE = "%d/auth.token";
           PRICEBOT_BEBOT_CHANNEL_ID = opts.mattermost-channel-id;
           PRICEBOT_TARGET_CURRENCY = opts.currency;
           PRICEBOT_NOTIFY_USER = opts.notify-user;