diff --git a/Dockerfile b/Dockerfile
index bc5e364..458afab 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,8 +3,7 @@
 RUN echo "1.565.2" > .lts-version-number
 
 RUN apt-get update && apt-get install -y wget git curl zip && apt-get clean
-RUN apt-get update && apt-get install -y --no-install-recommends openjdk-7-jdk && apt-get clean
-RUN apt-get update && apt-get install -y maven ant ruby rbenv make && apt-get clean
+RUN apt-get update && apt-get install -y --no-install-recommends openjdk-7-jdk && apt-get clean bash
 
 RUN wget -q -O - http://pkg.jenkins-ci.org/debian-stable/jenkins-ci.org.key | sudo apt-key add -
 RUN echo deb http://pkg.jenkins-ci.org/debian-stable binary/ >> /etc/apt/sources.list
@@ -18,16 +17,15 @@
 USER jenkins
 
 # VOLUME /var/jenkins_home - bind this in via -v if you want to make this persistent.
-VOLUME /var/jenkins_home
 ENV JENKINS_HOME /var/jenkins_home
 
 # define url prefix for running jenkins behind Apache (https://wiki.jenkins-ci.org/display/JENKINS/Running+Jenkins+behind+Apache)
 ENV JENKINS_PREFIX /
 
 # for main web interface:
-EXPOSE 8080 
+EXPOSE 8080
 
 # will be used by attached slave agents:
-EXPOSE 50000 
+EXPOSE 50000
 
 CMD ["/usr/local/bin/jenkins.sh"]