diff --git a/scripts/ci/install-deps.sh b/scripts/ci/install-deps.sh
index 6484ebab29..a2e2e59a45 100755
--- a/scripts/ci/install-deps.sh
+++ b/scripts/ci/install-deps.sh
@@ -7,6 +7,7 @@ scripts/fetchdep.sh matrix-org matrix-js-sdk
 pushd matrix-js-sdk
 yarn link
 yarn install
+yarn build
 popd
 
 yarn link matrix-js-sdk