diff --git a/build-constraints.yaml b/build-constraints.yaml
index 1412a117..abdac281 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2165,8 +2165,8 @@ packages:
         - bytestring-to-vector
 
     "Jakub Fijałkowski <kuba@codinginfinity.me> @jakubfijalkowski":
-        - hlibsass
-        - hsass
+        - hlibsass < 0 # https://github.com/commercialhaskell/stackage/issues/5075
+        - hsass < 0 # via hlibsass
 
     "Robert Massaioli <robertmassaioli@gmail.com> @robertmassaioli":
         - range
@@ -4031,7 +4031,7 @@ packages:
         - pandoc-csv2table < 0 # https://github.com/baig/pandoc-csv2table/issues/27
 
     "Elben Shira <elben@shira.im> @elben":
-        - pencil
+        - pencil < 0 # via hsass
 
     "ARATA Mizuki <minorinoki@gmail.com> @minoki":
         - unboxing-vector