* Package:    dev-go/gogo-protobuf-0.4_p20170815
 * Repository: gentoo
 * 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/dev-go/gogo-protobuf-0.4_p20170815/work
>>> Preparing source in /var/tmp/portage/dev-go/gogo-protobuf-0.4_p20170815/work/gogo-protobuf-0.4_p20170815 ...
>>> Source prepared.
>>> Configuring source in /var/tmp/portage/dev-go/gogo-protobuf-0.4_p20170815/work/gogo-protobuf-0.4_p20170815 ...
>>> Source configured.
>>> Compiling source in /var/tmp/portage/dev-go/gogo-protobuf-0.4_p20170815/work/gogo-protobuf-0.4_p20170815 ...
/var/tmp/portage/dev-go/gogo-protobuf-0.4_p20170815/work/gogo-protobuf-0.4_p20170815/src /var/tmp/portage/dev-go/gogo-protobuf-0.4_p20170815/work/gogo-protobuf-0.4_p20170815
failed to initialize build cache at /root/cache/go-build: mkdir /root/cache: permission denied
 * ERROR: dev-go/gogo-protobuf-0.4_p20170815::gentoo failed (compile phase):
 *   (no error message)
 * 
 * Call stack:
 *     ebuild.sh, line 124:  Called src_compile
 *   environment, line 454:  Called die
 * The specific snippet of code:
 *       GOPATH="${WORKDIR}/${P}" go install ${EGO_PN}/protoc-gen-gogo || die;
 * 
 * If you need support, post the output of `emerge --info '=dev-go/gogo-protobuf-0.4_p20170815::gentoo'`,
 * the complete build log and the output of `emerge -pqv '=dev-go/gogo-protobuf-0.4_p20170815::gentoo'`.
 * The complete build log is located at '/var/log/portage/dev-go:gogo-protobuf-0.4_p20170815:20190303-120625.log'.
 * For convenience, a symlink to the build log is located at '/var/tmp/portage/dev-go/gogo-protobuf-0.4_p20170815/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/dev-go/gogo-protobuf-0.4_p20170815/temp/environment'.
 * Working directory: '/var/tmp/portage/dev-go/gogo-protobuf-0.4_p20170815/work/gogo-protobuf-0.4_p20170815/src'
 * S: '/var/tmp/portage/dev-go/gogo-protobuf-0.4_p20170815/work/gogo-protobuf-0.4_p20170815'