diff --git a/build-constraints.yaml b/build-constraints.yaml
index 2bcfb2b0..84f2a378 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -816,6 +816,7 @@ packages:
         - lucid-svg
         - diagrams-html5
         - static-canvas
+        - reflex-gloss
 
     "Gabríel Arthúr Pétursson gabriel@system.is":
         - sdl2