[Bug] Autocomplete alias command

[ChunYen-Chen]

Edge case: If user define alias or load some module in thier .bashrc, the sub-shell here will behave differently and might cause problem.
For example, define alias python='python3'.
Compare to ./configure.py before, I'm not sure which one will be better.
Just put an edge case out.
I think that user will need to modify their python path at some place eventually. Similiar problem apply to all of the generate_make.sh.

Originally posted by @technic960183 in #357 (comment)