diff --git a/Dockerfile.jenkins b/Dockerfile.jenkins
index 638bdfa..2fd7216 100644
--- a/Dockerfile.jenkins
+++ b/Dockerfile.jenkins
@@ -1,4 +1,4 @@
 FROM schemers/chibi:head
 RUN apt-get update && apt-get install -y \
-    ca-certificates libffi-dev docker.io
+    gcc ca-certificates libffi-dev docker.io
 RUN snow-chibi install --impls=chibi retropikzel.test-r7rs