diff --git a/build-constraints.yaml b/build-constraints.yaml
index a404f406..25169466 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1095,8 +1095,9 @@ packages:
         - system-argv0
         - markdown-unlit
 
-    "Mateusz Kowalczyk <fuuzetsu@fuuzetsu.co.uk> @Fuuzetsu":
-        - aeson-schema
+    # "Mateusz Kowalczyk <fuuzetsu@fuuzetsu.co.uk> @Fuuzetsu":
+        # Excluded due to inactivity: https://github.com/fpco/stackage/issues/856
+        # - aeson-schema
         # H needs inline-r
         # - H
         # inline-r-0.7.1.2 doesn't allow vector-0.11
@@ -1755,9 +1756,6 @@ packages:
         # https://github.com/GaloisInc/cryptol/issues/275
         - sbv < 5.0
 
-        # https://github.com/fpco/stackage/issues/856
-        - syb < 0.6
-
         # https://github.com/fpco/stackage/issues/860
         - optparse-applicative < 0.12