$ sudo cat /var/tmp/portage/app-editors/atom-bin-9999/temp/build.log
 * Package:    app-editors/atom-bin-9999
 * Repository: aegypius
 * Maintainer: aegypius@github.com
 * USE:        abi_x86_64 amd64 elibc_glibc kernel_linux userland_GNU
 * FEATURES:   preserve-libs sandbox userpriv usersandbox
>>> Unpacking source...
>>> Unpacking atom-1.18.0.deb to /var/tmp/portage/app-editors/atom-bin-9999/work
>>> Unpacking data.tar.xz to /var/tmp/portage/app-editors/atom-bin-9999/work
>>> Source unpacked in /var/tmp/portage/app-editors/atom-bin-9999/work
>>> Preparing source in /var/tmp/portage/app-editors/atom-bin-9999/work/atom-bin-9999 ...
>>> Source prepared.
>>> Configuring source in /var/tmp/portage/app-editors/atom-bin-9999/work/atom-bin-9999 ...
>>> Source configured.
>>> Compiling source in /var/tmp/portage/app-editors/atom-bin-9999/work/atom-bin-9999 ...
>>> Source compiled.
>>> Test phase [not enabled]: app-editors/atom-bin-9999

>>> Install atom-bin-9999 into /var/tmp/portage/app-editors/atom-bin-9999/image/ category app-editors
chmod: cannot access '/var/tmp/portage/app-editors/atom-bin-9999/image//usr/share/atom/resources/app/node_modules/dugite/git/bin/*': No such file or directory
 * ERROR: app-editors/atom-bin-9999::aegypius failed (install phase):
 *   fperms failed
 *
 * If you need support, post the output of `emerge --info '=app-editors/atom-bin-9999::aegypius'`,
 * the complete build log and the output of `emerge -pqv '=app-editors/atom-bin-9999::aegypius'`.
 * The complete build log is located at '/var/tmp/portage/app-editors/atom-bin-9999/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/app-editors/atom-bin-9999/temp/environment'.
 * Working directory: '/var/tmp/portage/app-editors/atom-bin-9999/work/atom-bin-9999'
 * S: '/var/tmp/portage/app-editors/atom-bin-9999/work/atom-bin-9999'