diff --git a/build-constraints.yaml b/build-constraints.yaml
index b8e7ec41..73244d40 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -5523,6 +5523,9 @@ expected-test-failures:
 
     # https://github.com/iij-ii/direct-hs/issues/100
     - skews
+
+    # https://github.com/tomphp/haskell-cfenv/issues/1
+    - cfenv
 # end of expected-test-failures
 
 # Benchmarks which are known not to build. Note that, currently we do not run