Bonface,

Bonface Munyoki K. writes:
> What do you do when you want to use a package that
> has already been removed from guix. An example is
> that I have a legacy project that I help maintain
> that still uses some old python2 packages. One of
> them is python2-flask*. Right now, as a work
> around, I manually write the package definitions
> somewhere and build those; but I feel there are
> better ways of doing that. What ways, if any, are
> those?

You can use an ‘inferior’[0] Guix if you don't mind the entire 
closure of python2-flask* being frozen in the past -- possibly 
including incompatibilities or known security vulnerabilities.

I don't know what their inclusion & maintenance criteria are, but 
another approach is to add the removed packages to the 
guix-past[1] channel.

Kind regards,

T G-R

[0]: https://guix.gnu.org/manual/devel/en/html_node/Inferiors.html
[1]: https://gitlab.inria.fr/guix-hpc/guix-past