diff --git a/build-constraints.yaml b/build-constraints.yaml
index 9d94a491..a30fa5d6 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -11,6 +11,9 @@ packages:
         # on behalf of Bryan O'Sullivan @bos:
         - zstd
 
+    "Jacek Galowicz <jacek@galowicz.de> @tfc":
+        - hamtsolo
+
     "Ferdinand van Walree <ferdinandvwalree@gmail.com> @Ferdinand-vW":
         - sessiontypes
         - sessiontypes-distributed