diff --git a/pkgs/development/haskell-modules/configuration-nix.nix b/pkgs/development/haskell-modules/configuration-nix.nix
index f88ad83dd957..038feab79e72 100644
--- a/pkgs/development/haskell-modules/configuration-nix.nix
+++ b/pkgs/development/haskell-modules/configuration-nix.nix
@@ -185,6 +185,10 @@ builtins.intersectAttrs super {
     }) super.threadscope
   );
 
+  # Test suite loops forever by design (?!)
+  # https://hackage-content.haskell.org/package/lager-1.0.0.0/src/test/Main.hs
+  lager = dontCheck super.lager;
+
   # Binary may be used separately for e.g. editor integrations
   cabal-cargs = enableSeparateBinOutput super.cabal-cargs;