diff --git a/runon.conf b/runon.conf
index e9a8b25..c6ab112 100644
--- a/runon.conf
+++ b/runon.conf
@@ -17,12 +17,13 @@ binds =
 
 [centos7]
 dockerfile =
-	  FROM centos:7
+    FROM centos:7
     RUN yum install sudo -y
     RUN echo "Defaults lecture = never" >> /etc/sudoers
     RUN echo "ALL ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers
+    RUN yum group install -y "Development Tools"
 pkginstall = RUN yum install {} -y
-packages = ksh csh xterm xorg-x11-apps xkeyboard-config git glibc-devel gtk2 gtk3 alsa-lib python2 python3 bash-completion redhat-lsb-core environment-modules
+packages = xterm vim-X11 git python3 bash-completion
 
 [centos8]
 dockerfile =