diff --git a/pkgs/servers/ttyd/default.nix b/pkgs/servers/ttyd/default.nix
index 68731b6f717d..23b782c540db 100644
--- a/pkgs/servers/ttyd/default.nix
+++ b/pkgs/servers/ttyd/default.nix
@@ -1,6 +1,7 @@
 { lib, stdenv, fetchFromGitHub
 , pkg-config, cmake, xxd
 , openssl, libwebsockets, json_c, libuv, zlib
+, nixosTests
 }:
 
 with builtins;