diff --git a/build-constraints.yaml b/build-constraints.yaml
index d839e240..aaadabbb 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1,6 +1,9 @@
 ghc-major-version: "8.0"
 # Constraints for brand new builds
 packages:
+    "Simon Jakobi <simon.jakobi@gmail.com> @sjakobi":
+        - threepenny-gui
+
     "Joe M <joe9mail@gmail.com> @joe9":
         - logger-thread
         - text-generic-pretty