PKGDIR
From Gentoo Wiki
PKGDIR is the location Portage keeps binary packages. By default, the location is set to /var/cache/binpkgs.
Previously, binary packages were set to ${PORTDIR}/packages, which by default resolved to /usr/portage/packages.
Run man make.conf for more information.
See also
- DISTDIR — defines the location where Portage will store the downloaded source code archives.
- Binary package guide — in-depth binary package creation, distribution, use, and maintenance