diff --git a/kafka/Dockerfile b/kafka/Dockerfile
index a1a621c..c1e2c01 100644
--- a/kafka/Dockerfile
+++ b/kafka/Dockerfile
@@ -1,27 +1,29 @@
 ARG REGISTRY=swh-jenkins
 FROM $REGISTRY/tox
 
 USER root
 RUN DEBIAN_FRONTEND=noninteractive apt-get update && \
   apt-get install -y --no-install-recommends \
     default-jdk && \
     rm -rf /var/lib/apt/lists/*
 
 # retrieve and uncompress kafka application, checking it's the
 # expected archive we retrieve
 ARG SCALA_VERSION=2.12
 ARG KAFKA_VERSION=2.1.1
 ARG KAFKA_APP=kafka_${SCALA_VERSION}-${KAFKA_VERSION}
 ARG TARBALL=${KAFKA_APP}.tgz
 ARG KAFKA_SHA512SUM=a2e8168e8de6b45e8fca1f2883f0744d3c5a939b70d8a47a5428b72188501d4c2fc11bc35759f2392680d4e8ecf2fa9d0e518e77fd28393afba22194ad018b10
 ARG CHECKSUMS=${TARBALL}.sha512
 
 RUN wget http://apache.mirrors.ovh.net/ftp.apache.org/dist/kafka/${KAFKA_VERSION}/${TARBALL} && \
     ( echo "${KAFKA_SHA512SUM}  ${TARBALL}" > ${CHECKSUMS} ) && \
     sha512sum -c ${CHECKSUMS} && \
     tar xvf ${TARBALL} -C /opt && \
     ln -s /opt/${KAFKA_APP} /opt/kafka && \
     chown -R jenkins: /opt/kafka &&
-    rm ${CHECKSUMS} ${TARBALL}
 
+FROM $REGISTRY/tox
+WORKDIR /opt
+COPY --from=0 /opt/ .
 USER jenkins