Once the script has done it's job, I can find all the compiled stuff in


packages/build/usr/local, so now I want a clean install/uninstall of all
the stuff
in my system so I'm doing 'make install' from package directory, but it
compiles again, is it the good way to go?

You should have a tar.gz in the parent directory of the root repo
directory.  Untar it, enter the directory it creates, then do `make install`
there.