diff --git a/overlay.nix b/overlay.nix
index b9f68e7a460d7a24d15015a72ffa7f49a5df512b..78b06e967d7da90e20895848209f1e8b50d17cf4 100644
--- a/overlay.nix
+++ b/overlay.nix
@@ -217,6 +217,8 @@ final: prev: with pkgs.haskell.lib; {
 
   tasty-hunit = doJailbreak (prev.callCabal2nix "tasty" (inputs.tasty + /hunit) { });
 
+  tasty-wai = doJailbreak (prev.callHackage "tasty-wai" "0.1.2.0" { });
+
   these = doJailbreak prev.these;
 
   th-lift-instances = prev.callCabal2nix "th-lift-instances" inputs.th-lift-instances { };