diff --git a/build-constraints.yaml b/build-constraints.yaml
index d3b81018..bcc103e6 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1300,6 +1300,9 @@ skipped-tests:
     # https://github.com/kaizhang/clustering/issues/2
     - clustering
 
+    # https://github.com/fpco/stackage/issues/668
+    - second-transfer
+
 # Tests which we should build and run, but which are expected to fail. We
 # should not fail a build based on a test failure for one of these packages.
 expected-test-failures: