diff --git a/contrib/build.Dockerfile b/contrib/build.Dockerfile
index 17ec3137d..57cbcd89a 100644
--- a/contrib/build.Dockerfile
+++ b/contrib/build.Dockerfile
@@ -2,8 +2,7 @@ FROM ubuntu:14.04
 
 ENV DEBIAN_FRONTEND=noninteractive
 
-RUN apt-get update
-RUN apt-get -y install gcc git build-essential wget ruby-dev ruby1.9.1 lintian rpm help2man man-db
+RUN apt-get update && apt-get -y install gcc git build-essential wget ruby-dev ruby1.9.1 lintian rpm help2man man-db
 RUN command -v fpm > /dev/null || sudo gem install fpm --no-ri --no-rdoc
 
 ARG GOLANG_VERSION