diff --git a/build-constraints.yaml b/build-constraints.yaml
index c74fe318..9a24b086 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -9130,6 +9130,7 @@ expected-test-failures:
     - hedn
     - idris # https://github.com/fpco/stackage/issues/1382
     - ihaskell # https://github.com/gibiansky/IHaskell/issues/551
+    - kdt # 0.2.5 https://github.com/giogadi/kdt/issues/7
     - lapack
     - math-functions # https://github.com/bos/math-functions/issues/25
     - mltool # https://github.com/Alexander-Ignatyev/mltool/issues/1