[gentoo-user] Reinstalling older Packages

[Frank Schwidom]

Hi,

how is it possible to reinstall an older Package from
/usr/portage/distfiles/<package>, when the corresponding
ebuild /usr/portage/<topic>/<package>/<version>.ebuild
does not longer exists? Is there an option, to keep older
ebuilds intact during emerge --sync?

thanks in advance
regards
f. schwidom