diff --git a/build-constraints.yaml b/build-constraints.yaml
index 2e7247e7..a2015479 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1018,7 +1018,8 @@ packages:
         - plot-gtk3
 
         - vector-buffer
-        - hmatrix-repa
+        # Blocking due to https://github.com/amcphail/hmatrix-repa/issues/2
+        # - hmatrix-repa
 
     "Noam Lewis <jones.noamle@gmail.com> @sinelaw":
         - xml-to-json