diff --git a/build-constraints.yaml b/build-constraints.yaml
index 6908036c..4c63a546 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -6020,7 +6020,6 @@ packages:
 
         # Misc
         - cuda < 0
-        - vault < 0
         - vivid-osc < 0
         - flay < 0
         - barbies < 0
@@ -6965,6 +6964,9 @@ expected-haddock-failures:
     - bins
     - emd
     - hmatrix-backprop
+
+    # https://github.com/haskell/haddock/issues/1091
+    - vault
 # end of expected-haddock-failures
 
 # For packages with haddock issues