diff --git a/build-constraints.yaml b/build-constraints.yaml
index 2ed90463..c2ee44f0 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2164,6 +2164,8 @@ packages:
         - dejafu < 0.3
         - async-dejafu < 0.1.1
 
+        # https://github.com/tidalcycles/Tidal/issues/100
+        - PortMidi < 0.1.6
 # end of packages