diff --git a/build-constraints.yaml b/build-constraints.yaml
index 0ea1a782..9ac1ca16 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3227,7 +3227,7 @@ packages:
 
     "Dino Morelli <dino@ui3.info> @dino-":
         - epub-metadata
-        - hsinstall
+        - hsinstall < 2.5 # hsinstall is missing fmt, a dependency added in hsinstall 2.5
         - tce-conf
 
     "Jonathan Fischoff <jonathangfischoff@gmail.com> @jfischoff":