diff --git a/Dockerfile.jenkins b/Dockerfile.jenkins
index b7720a9..7928040 100644
--- a/Dockerfile.jenkins
+++ b/Dockerfile.jenkins
@@ -1,4 +1,4 @@
 FROM schemers/chibi:head
 RUN apt-get update && apt-get install -y \
     gcc ca-certificates libffi-dev docker.io make
-RUN snow-chibi install --impls=chibi retropikzel.test-r7rs
+RUN snow-chibi install --impls=chibi --always-yes retropikzel.test-r7rs