Add the following lines to you .bashrc file in you home directory.
PATH="$PATH:/home/threader/kinetic/bin/qmake"
export PATH
Chances are lines like above already exist, so you add ":/home/threader/kinetic/bin/qmake" to the end of the string.
If you're not using the default Bash shell (which I doubt), find .cshrc, etc.
This is not Qt issue.
Google .bashrc
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