Bootstrap: docker From: ubuntu:18.04 %labels MAINTAINER Laurent Modolo %post TOPHAT_VERSION=2.1.1 PACKAGES=tophat=${BOWTIE2_VERSION}* apt-get update && \ apt-get install -y --no-install-recommends ${PACKAGES} && \ apt-get clean %environment export TOPHAT_VERSION=2.1.1 %runscript exec /bin/bash "$@"