diff --git a/build-constraints.yaml b/build-constraints.yaml
index ca14ed3e..592f5dd6 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -4962,6 +4962,7 @@ expected-test-failures:
     - hoopl # https://github.com/haskell/hoopl/issues/50
     - hspec-expectations-pretty-diff # GHC 8 issue not reported upstream since issue tracker disabled
     - hweblib # https://github.com/aycanirican/hweblib/issues/3
+    - libraft # https://github.com/commercialhaskell/stackage/issues/4337#issuecomment-462465921
     - multiset # doctests require Glob, a hidden package
     - perf # https://github.com/fpco/stackage/pull/2859
     - picosat # https://github.com/fpco/stackage/pull/2382