diff --git a/build-constraints.yaml b/build-constraints.yaml
index 05db9d82..2130945c 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -5221,11 +5221,17 @@ packages:
         - bower-json
         - boxes
         - cassava
+        - coercible-utils # 6271
         - curl
         - first-class-patterns # #5965/closed
+        - hashing # 6271
+        - hnix-store-core # 6271
         - ilist # #5965/closed
+        - monadlist # 6271
         - non-empty-sequence
+        - path # 6271
         - pattern-arrows
+        - ref-tf # 6271
         - relude # #5965/closed
         - shellmet # #5965/closed
         - slist # #5965/closed
@@ -5252,13 +5258,16 @@ packages:
         - fingertree-psqueue < 0 # BuildFailureException Process exited with ExitFailure 1: ./Setup build
         - hastache < 0 # GHC 8.4 via base-4.11.0.0
         - heart-core < 0 # deprecated
+        - hnix < 0 # 6271
         - json-builder < 0 # build failure with GHC 8.4 https://github.com/lpsmith/json-builder/issues/2
         - lens-labels < 0 # deprecated https://github.com/commercialhaskell/stackage/pull/4358
         - membrain < 0 # #5965/closed
         - preprocessor-tools < 0 # build failure with GHC 8.4
+        - present < 0 # 6271
         - prim-array < 0 # BuildFailureException Process exited with ExitFailure 1: ./Setup build
         - proto-lens-combinators < 0 # deprecated https://github.com/commercialhaskell/stackage/pull/4358
         - shortcut-links < 0 # #5965/closed
+        - snap-server < 0 # 6271
         - syb-with-class < 0 # GHC 8.4 via template-haskell-2.13.0.0
         - tinytemplate < 0 # build failure with GHC 8.4
         - tomland < 0 # #5965/closed