Add basic build phases:
Add basic build phases:

We can now configure 'pre_build' and 'post_build' as phases during the
build. This allows introducing arbitrary commands that will be executed.

The particular use-case for it is DBD::mysql that requires copying the
sources to a /tmp directory beforehand. This is pretty crazy, though. :/

xsawyerx/pakket,xsawyerx/pakket,xsawyerx/pkt