diff --git a/build-constraints.yaml b/build-constraints.yaml
index e4483e23..2514954a 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -360,7 +360,8 @@ packages:
         - BlogLiterately-diagrams
         - diagrams
         - diagrams-builder
-        - diagrams-haddock
+        # https://github.com/diagrams/diagrams-haddock/issues/26
+        - diagrams-haddock < 0.3.0.8
         - diagrams-contrib
         - diagrams-core
         - diagrams-lib