diff --git a/build-constraints.yaml b/build-constraints.yaml
index a82abd25..49a5434f 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -253,8 +253,8 @@ packages:
         # - stripe-core # bounds: aeson 1.0
 
     "Piotr Mlodawski @pmlodawski":
-        []
-        # - signal # GHC 8.2.1
+        - error-util
+        - signal
         # - ghc-session # bounds: GHC 8
 
     "Michael Snoyman michael@snoyman.com @snoyberg":