diff --git a/build-constraints.yaml b/build-constraints.yaml
index 17524a89..7b4e4b70 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -4482,6 +4482,7 @@ expected-test-failures:
     # in the test cases.
     - DRBG # https://github.com/TomMD/DRBG/issues/7
     - bitx-bitcoin # https://github.com/tebello-thejane/bitx.hs/issues/4
+    - cabal2nix # https://github.com/NixOS/cabal2nix/issues/398
     - courier # https://github.com/hargettp/courier/issues/19
     - download # https://github.com/fpco/stackage/issues/2811
     - haskell-tools-demo # https://github.com/haskell-tools/haskell-tools/issues/624