diff --git a/flake.nix b/flake.nix
index d76cd0dbb91384f24058155dde88de4a2b4cb077..eb1695e368796cf2c16a1cf2fe22227436c3a48d 100644
--- a/flake.nix
+++ b/flake.nix
@@ -105,6 +105,8 @@
             export PKG_CONFIG_PATH=${pkgs.lib.makeSearchPath "lib/pkgconfig" [pkgs.zlib.dev]}
 
             pkg-config --list-all
+
+            cabal build --enable-tests -v3
           '';
         };
         release = hslib.apps.release {};