diff --git a/Dockerfile b/Dockerfile
index f0cac6baade558f3c29df01e90f2ffd78a9af20b..86174329e0900f2960fbf862229d47a2b34d2667 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -13,8 +13,7 @@ ENV DEBCONF_NOWARNINGS yes
 
 # Fix locale
 RUN locale-gen en_US.UTF-8
-echo "LANG=\"en_US.UTF-8\"" > /etc/default/locale
-echo "LANGUAGE=\"en_US:en\"" >> /etc/default/locale
+RUN echo "LANG=\"en_US.UTF-8\"" > /etc/default/locale && echo "LANGUAGE=\"en_US:en\"" >> /etc/default/locale
 
 # Install Jenkins
 RUN echo "deb http://pkg.jenkins-ci.org/debian binary/" > /etc/apt/sources.list.d/jenkins.list