diff --git a/flake.nix b/flake.nix
index 0e5a493..e484bf0 100644
--- a/flake.nix
+++ b/flake.nix
@@ -18,6 +18,7 @@
           packages.mailcat = naersk-lib.buildPackage {
             pname = "mailcat";
             root = ./.;
+            doCheck = true;
           };
           defaultPackage = packages.mailcat;
           apps.mailcat = flake-utils.lib.mkApp {