diff --git a/build-constraints.yaml b/build-constraints.yaml
index fd116a0b..3dcbc840 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -147,6 +147,7 @@ packages:
         - essence-of-live-coding-pulse
         - essence-of-live-coding-gloss
         - essence-of-live-coding-quickcheck
+        - pulse-simple
 
     "Paul Johnson <paul@cogito.org.uk> @PaulJohnson":
         - geodetics