diff --git a/build-constraints.yaml b/build-constraints.yaml
index 723209ef..60f9c12c 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3392,7 +3392,7 @@ packages:
         - attoparsec-time < 0 # GHC 8.4 via doctest-0.15.0
         - hint < 0 # GHC 8.4 via ghc-8.4.1
         - syb-with-class < 0 # GHC 8.4 via template-haskell-2.13.0.0
-        - exception-mtl < 0 # GHC 8.4 via exception-transformers
+        - exception-mtl
         - consul-haskell < 0 # GHC 8.4 via uuid
         - hasql-transaction < 0 # GHC 8.4 via hasql
         - language-ecmascript < 0 # wl-pprint