title: Overriding System Binaries With Home Directory Binaries
body: <p>I'm trying to compile a piece of software in my home directory (OpenMPI). One of the build dependencies (autoconf) installed on my system is not the newer version asked for by the OpenMPI autogen script. I compiled and installed the newer version of autoconf in my home directory. </p>
  
  <p>Is there anyway for the binary installed in my home directory to "override" the version installed on the system for my session? </p>
  
  <p>I tried setting an alias which works via command line but not for the script used to generate the configure script.</p>