* Package:    app-emulation/umoci-0.2.1
 * Repository: gentoo
 * Maintainer: williamh@gentoo.org
 * USE:        abi_x86_64 amd64 elibc_glibc kernel_linux userland_GNU
 * FEATURES:   network-sandbox preserve-libs sandbox userpriv usersandbox
>>> Unpacking source...
>>> Source unpacked in /var/tmp/portage/app-emulation/umoci-0.2.1/work
>>> Preparing source in /var/tmp/portage/app-emulation/umoci-0.2.1/work/umoci-0.2.1/src/github.com/openSUSE/umoci ...
>>> Source prepared.
>>> Configuring source in /var/tmp/portage/app-emulation/umoci-0.2.1/work/umoci-0.2.1/src/github.com/openSUSE/umoci ...
>>> Source configured.
>>> Compiling source in /var/tmp/portage/app-emulation/umoci-0.2.1/work/umoci-0.2.1/src/github.com/openSUSE/umoci ...
env GOPATH=/var/tmp/portage/app-emulation/umoci-0.2.1/work/umoci-0.2.1:/usr/lib/go-gentoo go build -v -work -x -ldflags -w -X main.gitCommit=0465f83826bc4f52e6e3c4dbb1022ec5792c421f -X main.version=0.2.1 -o bin/umoci ./cmd/umoci
WORK=/var/tmp/portage/app-emulation/umoci-0.2.1/temp/go-build706655517
failed to initialize build cache at /root/cache/go-build: mkdir /root/cache: permission denied
 * ERROR: app-emulation/umoci-0.2.1::gentoo failed (compile phase):
 *   (no error message)
 * 
 * Call stack:
 *     ebuild.sh, line 124:  Called src_compile
 *   environment, line 418:  Called die
 * The specific snippet of code:
 *       "$@" || die;
 * 
 * If you need support, post the output of `emerge --info '=app-emulation/umoci-0.2.1::gentoo'`,
 * the complete build log and the output of `emerge -pqv '=app-emulation/umoci-0.2.1::gentoo'`.
 * The complete build log is located at '/var/log/portage/app-emulation:umoci-0.2.1:20190312-063958.log'.
 * For convenience, a symlink to the build log is located at '/var/tmp/portage/app-emulation/umoci-0.2.1/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/app-emulation/umoci-0.2.1/temp/environment'.
 * Working directory: '/var/tmp/portage/app-emulation/umoci-0.2.1/work/umoci-0.2.1/src/github.com/openSUSE/umoci'
 * S: '/var/tmp/portage/app-emulation/umoci-0.2.1/work/umoci-0.2.1/src/github.com/openSUSE/umoci'