What I typically do is install non-default versions of the projects under/usr/local. At that point I design the document $HOME/.bash_profile so the $PATH variable has/usr/loacl/bin first, previously/usr/bin and/bin (which may really be a similar actual registry on your framework).
$HOME/.bash_profile:
# If not running interactively, don't do anything
case $- in
*i*) ;;
*) return;;
esac
# PATH starts with...
PATH="/usr/local/bin"
# add $HOME/bin if it exists...
if [ -d "${HOME}/bin" ]; then
PATH="${PATH}:${HOME}/bin"
fi
# These should exist, add them as fall back....
PATH="${PATH}:/bin:/usr/bin:/sbin:/usr/sbin"
# Some custom locations last
if [ -d /usr/local/arm-elf/bin ]; then
PATH="${PATH}:/usr/local/arm-elf/bin"
fi
if [ -d /opt/local/bin ]; then
PATH="${PATH}:/opt/local/bin"
fi
This has the impact of making anything situated in /usr/local/bin the default when I am utilizing an interactive shell, and letting the framework defaults stay basically something else.
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