diff --git a/build-constraints.yaml b/build-constraints.yaml
index c197bef7e..e843ee252 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3450,7 +3450,7 @@ packages:
         - gi-xlib
         - gi-harfbuzz
         - gi-gtksource
-        - gi-gtksource3
+        - gi-gtksource3 < 0 # needs Ubuntu package in image
         - gi-gtksource5
         - gi-javascriptcore
         - gi-javascriptcore4