diff --git a/pkgs/by-name/kn/knot-resolver-manager_6/package.nix b/pkgs/by-name/kn/knot-resolver-manager_6/package.nix
index 890e71fdb362..e2c518e8c89e 100644
--- a/pkgs/by-name/kn/knot-resolver-manager_6/package.nix
+++ b/pkgs/by-name/kn/knot-resolver-manager_6/package.nix
@@ -44,6 +44,7 @@ python3Packages.buildPythonPackage {
     prometheus-client
     supervisor
     typing-extensions
+    watchdog
   ];
 
   # set up (additional) Lua dependencies