diff --git a/ci/build-ui.sh b/ci/build-ui.sh
index e450ecd..de4cf7f 100644
--- a/ci/build-ui.sh
+++ b/ci/build-ui.sh
@@ -1,5 +1,7 @@
 #!/bin/sh -ex
 
+export TEMP="${WORKSPACE_TMP}"
+
 # https://github.com/npm/cli/issues/3208#issuecomment-1002990902
 # Work around crazy performance issue in npm@7 / npm@8
 mkdir node_modules