diff --git a/build-constraints.yaml b/build-constraints.yaml
index 7d55f06b..f6b0ab1b 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2738,6 +2738,9 @@ expected-test-failures:
 
     # https://github.com/haskell-servant/servant/issues/488
     - servant
+
+    # https://github.com/fpco/stackage/issues/1399
+    - darcs
 # end of expected-test-failures
 
 # Benchmarks which are known not to build. Note that, currently we do not run