diff --git a/Dockerfile b/Dockerfile
index 5091f6f..bd4b3a9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -21,6 +21,7 @@ COPY . .
 # Build the test runner
 RUN set -ex; \
   corepack enable; \
+  corepack pack; \
   # install all the development modules (used for building)
   yarn install; \
   yarn build; \