Added a check to see if the file has already been installed.

README.rst

@@ -83,7 +83,9 @@ Install
 
 Build and Install Using [Antigen](https:/github.com/zsh-users/antigen)
 --------
+
 Include the bundle in your ``.zshrc``
+
 ``antigen bundle thewtex/tmux-mem-cpu-load``
 
 Configuring tmux_

tmux-mem-cpu-load.plugin.zsh

@@ -1,7 +1,10 @@
 # vim: tabstop=2 shiftwidth=2 expandtab textwidth=80 linebreak wrap
 
-pushd ${0:a:h} #Pushd to the directory where this file is located.
+if [ ! -s /usr/local/bin/tmux-mem-cpu-load ];
+then
+  pushd ${0:a:h} #Pushd to the directory where this plugin is located.
   cmake .
   make
   sudo make install
   popd
+fi