diff --git a/build-constraints.yaml b/build-constraints.yaml
index 74ebd7af..d528fbaa 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -341,9 +341,11 @@ packages:
         - reflection
         - semigroupoid-extras
         - semigroupoids
+        # https://github.com/fpco/stackage/issues/1190
         - semigroups < 0.18.1
         - speculation
         - streams
+        # https://github.com/fpco/stackage/issues/1191
         - tagged < 0.8.3
         - vector-instances
         - void
@@ -357,6 +359,7 @@ packages:
         - hyperloglog
 
     "Andrew Farmer <afarmer@ittc.ku.edu>":
+        # https://github.com/fpco/stackage/issues/1189
         - scotty < 0.11
         - wai-middleware-static