* Package:    dev-util/docker-distribution-pruner-0_p20170401
 * Repository: gentoo
 * USE:        abi_x86_64 amd64 elibc_glibc kernel_linux userland_GNU
 * FEATURES:   network-sandbox preserve-libs sandbox userpriv usersandbox
>>> Unpacking source...
 * Vendoring gopkg.in/yaml.v2 github.com-go-yaml-yaml-a3f3340b5840cee44f372bddb5880fcbc419b46a.tar.gz
>>> Source unpacked in /var/tmp/portage/dev-util/docker-distribution-pruner-0_p20170401/work
>>> Preparing source in /var/tmp/portage/dev-util/docker-distribution-pruner-0_p20170401/work/docker-distribution-pruner-0_p20170401 ...
>>> Source prepared.
>>> Configuring source in /var/tmp/portage/dev-util/docker-distribution-pruner-0_p20170401/work/docker-distribution-pruner-0_p20170401 ...
>>> Source configured.
>>> Compiling source in /var/tmp/portage/dev-util/docker-distribution-pruner-0_p20170401/work/docker-distribution-pruner-0_p20170401 ...
/var/tmp/portage/dev-util/docker-distribution-pruner-0_p20170401/work/docker-distribution-pruner-0_p20170401/src /var/tmp/portage/dev-util/docker-distribution-pruner-0_p20170401/work/docker-distribution-pruner-0_p20170401
failed to initialize build cache at /root/cache/go-build: mkdir /root/cache: permission denied
 * ERROR: dev-util/docker-distribution-pruner-0_p20170401::gentoo failed (compile phase):
 *   (no error message)
 * 
 * Call stack:
 *     ebuild.sh, line 124:  Called src_compile
 *   environment, line 465:  Called die
 * The specific snippet of code:
 *       GOPATH="${WORKDIR}/${P}" go install gitlab.com/gitlab-org/docker-distribution-pruner || die;
 * 
 * If you need support, post the output of `emerge --info '=dev-util/docker-distribution-pruner-0_p20170401::gentoo'`,
 * the complete build log and the output of `emerge -pqv '=dev-util/docker-distribution-pruner-0_p20170401::gentoo'`.
 * The complete build log is located at '/var/log/portage/dev-util:docker-distribution-pruner-0_p20170401:20190306-131132.log'.
 * For convenience, a symlink to the build log is located at '/var/tmp/portage/dev-util/docker-distribution-pruner-0_p20170401/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/dev-util/docker-distribution-pruner-0_p20170401/temp/environment'.
 * Working directory: '/var/tmp/portage/dev-util/docker-distribution-pruner-0_p20170401/work/docker-distribution-pruner-0_p20170401/src'
 * S: '/var/tmp/portage/dev-util/docker-distribution-pruner-0_p20170401/work/docker-distribution-pruner-0_p20170401'