[build2] R: problem with building build2 0.17

[Boris Kolpackov]

Minarelli Della Valle Roberto via users <users at build2.org> writes:
 
> Is it possible to download the packages of the preceding version?

No, not for the staged version of the toolchain. But if you have
the build2-toolchain archive for the previous version, you should
be able to do a local build even when it was replaced with a newer
version:

https://build2.org/install-faq.xhtml#offline