diff --git a/build-constraints.yaml b/build-constraints.yaml
index 8acda039..e6e5e3ac 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2425,6 +2425,9 @@ expected-test-failures:
     # https://github.com/fpco/stackage/issues/1125
     - jose-jwt
 
+    # https://github.com/fpco/stackage/issues/1173
+    - mustache
+
 # end of expected-test-failures