diff --git a/build-constraints.yaml b/build-constraints.yaml
index 0f2ae5a7..02e91af6 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3168,6 +3168,8 @@ expected-test-failures:
     - vector-algorithms # http://hub.darcs.net/dolio/vector-algorithms/issue/9
 
     - relational-record # https://github.com/khibino/haskell-relational-record/issues/51
+
+    - unicode-show # https://github.com/nushio3/unicode-show/issues/2
 # end of expected-test-failures
 
 # Benchmarks which are known not to build. Note that, currently we do not run