diff --git a/build-constraints.yaml b/build-constraints.yaml
index d348b757..14b30037 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -7,6 +7,9 @@ cabal-format-version: "1.24"
 
 # Constraints for brand new builds
 packages:
+    "Jacek Galowicz <jacek@galowicz.de> @tfc":
+        - hamtsolo
+
     "Ferdinand van Walree <ferdinandvwalree@gmail.com> @Ferdinand-vW":
         - sessiontypes
         - sessiontypes-distributed