diff --git a/module.nix b/module.nix
index 60f23ab..ec6776b 100644
--- a/module.nix
+++ b/module.nix
@@ -147,7 +147,7 @@ in
           OIDC_ENABLED = true;
           OIDC_DISPLAY_NAME= "Kanidm";
           OIDC_ISSUER = issuer;
-          OIDC_DISCOVERY = "true";
+          OIDC_DISCOVERY = toString "true";
           OIDC_SCOPE = "openid,profile";
           OIDC_UID_FIELD = "sub";
           OIDC_CLIENT_ID = oauthClientID;