also mount $HOME/.buildr into docker container.
diff --git a/ci-build.sh b/ci-build.sh
index 6a3f8ab..1a590b7 100755
--- a/ci-build.sh
+++ b/ci-build.sh
@@ -33,4 +33,4 @@
 
 FINAL_COMMAND="$CREATE_USER_COMMAND && $BUNDLER_COMMAND && $BUILDR_COMMAND"
 
-docker run --rm -e JAVADOC=no -e JAVA_OPTS -v `pwd`:/workspace -v $HOME/.m2:/home/dummy/.m2  -v /tmp:/tmp --entrypoint bash vanto/apache-buildr:latest-jruby-jdk7 -c "$FINAL_COMMAND"
\ No newline at end of file
+docker run --rm -e JAVADOC=no -e JAVA_OPTS -v `pwd`:/workspace -v $HOME/.m2:/home/dummy/.m2 -v $HOME/.buildr:/home/dummy/.buildr -v /tmp:/tmp --entrypoint bash vanto/apache-buildr:latest-jruby-jdk7 -c "$FINAL_COMMAND"