diff --git a/build-constraints.yaml b/build-constraints.yaml
index 9dcd3b36..2c1e032b 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -5543,6 +5543,7 @@ packages:
         - boolean-like < 0 # 0.1.1.0
         - btrfs < 0 # 0.2.0.0
         - bv-little < 0 # 1.1.1 - can't reproduce locally: No instance for (Eq BigNat)
+        - cabal-debian < 0 # 5.1
         - cabal-toolkit < 0 # 0.0.7
         - capataz < 0 # 0.2.1.0
         - chaselev-deque < 0 # 0.5.0.5
@@ -8095,6 +8096,7 @@ expected-test-failures:
     - curl-runnings # 0.17.0
     - crypt-sha512 # 0 Use -p '/crypt.$6$rounds=10$roundstoolow/' to rerun this test only.
     - dbus # 1.2.24 https://github.com/commercialhaskell/stackage/issues/6373
+    - debian # 4.0.2 https://github.com/clinty/debian-haskell/issues/2
     - dimensional # 1.4
     - download # 0.3.2.7 https://github.com/fpco/stackage/issues/2811
     - duration # 0.2.0.0