diff --git a/build-constraints.yaml b/build-constraints.yaml
index 1bb8eae9..b068e0a3 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1977,6 +1977,12 @@ packages:
         # https://github.com/fpco/stackage/issues/1215
         - argon < 0.4.1.0
 
+        # https://github.com/fpco/stackage/issues/1226
+        - unordered-containers < 0.2.7.0
+
+        # https://github.com/fpco/stackage/issues/1227
+        - diagrams-svg < 1.4
+
 # end of packages
 
 
@@ -2515,7 +2521,8 @@ skipped-benchmarks:
     # https://github.com/kaizhang/clustering/issues/2
     - clustering
 
-    # https://github.com/tibbe/unordered-containers/issues/122
+    # Successful build requires unordered-containers >= 0.2.7.0
+    # https://github.com/fpco/stackage/issues/1226
     - unordered-containers
 
 # end of skipped-benchmarks