* Package:    app-metrics/postfix_exporter-0.1.2
 * Repository: gentoo
 * Maintainer: mrueg@gentoo.org
 * USE:        abi_x86_64 amd64 elibc_glibc kernel_linux systemd userland_GNU
 * FEATURES:   network-sandbox preserve-libs sandbox userpriv usersandbox
 * Adding group 'postfix_exporter' to your system ...
 *  - Groupid: next available
 * Adding user 'postfix_exporter' to your system ...
 *  - Userid: 148
 *  - Shell: /sbin/nologin
 *  - Home: /dev/null
 *  - Groups: postfix_exporter
 *  - GECOS: added by portage for postfix_exporter
>>> Unpacking source...
 * Vendoring github.com/coreos/go-systemd github.com-coreos-go-systemd-bebb2b01b0473b183e4624aaf8e23ae6f4b22417.tar.gz
 * Vendoring github.com/coreos/pkg github.com-coreos-pkg-97fdf19511ea361ae1c100dd393cc47f8dcfa1e1.tar.gz
 * Vendoring github.com/prometheus/client_golang github.com-prometheus-client_golang-f504d69affe11ec1ccb2e5948127f86878c9fd57.tar.gz
 * Vendoring github.com/beorn7/perks github.com-beorn7-perks-3a771d992973f24aa725d07868b467d1ddfceafb.tar.gz
 * Vendoring github.com/golang/protobuf github.com-golang-protobuf-e09c5db296004fbe3f74490e84dcd62c3c5ddb1b.tar.gz
 * Vendoring github.com/prometheus/client_model github.com-prometheus-client_model-99fa1f4be8e564e8a6b613da7fa6f46c9edafc6c.tar.gz
 * Vendoring github.com/prometheus/common github.com-prometheus-common-38c53a9f4bfcd932d1b00bfc65e256a7fba6b37a.tar.gz
 * Vendoring github.com/matttproud/golang_protobuf_extensions github.com-matttproud-golang_protobuf_extensions-c12348ce28de40eed0136aa2b644d0ee0650e56c.tar.gz
 * Vendoring github.com/prometheus/procfs github.com-prometheus-procfs-780932d4fbbe0e69b84c34c20f5c8d0981e109ea.tar.gz
>>> Source unpacked in /var/tmp/portage/app-metrics/postfix_exporter-0.1.2/work
>>> Preparing source in /var/tmp/portage/app-metrics/postfix_exporter-0.1.2/work/postfix_exporter-0.1.2 ...
>>> Source prepared.
>>> Configuring source in /var/tmp/portage/app-metrics/postfix_exporter-0.1.2/work/postfix_exporter-0.1.2 ...
>>> Source configured.
>>> Compiling source in /var/tmp/portage/app-metrics/postfix_exporter-0.1.2/work/postfix_exporter-0.1.2 ...
/var/tmp/portage/app-metrics/postfix_exporter-0.1.2/work/postfix_exporter-0.1.2/src/github.com/kumina/postfix_exporter /var/tmp/portage/app-metrics/postfix_exporter-0.1.2/work/postfix_exporter-0.1.2
failed to initialize build cache at /root/cache/go-build: mkdir /root/cache: permission denied
 * ERROR: app-metrics/postfix_exporter-0.1.2::gentoo failed (compile phase):
 *   (no error message)
 * 
 * Call stack:
 *     ebuild.sh, line 124:  Called src_compile
 *   environment, line 843:  Called die
 * The specific snippet of code:
 *       GOPATH="${S}" go build -tags "$(usex systemd '' 'nosystemd')" -v -o bin/${PN} || die;
 * 
 * If you need support, post the output of `emerge --info '=app-metrics/postfix_exporter-0.1.2::gentoo'`,
 * the complete build log and the output of `emerge -pqv '=app-metrics/postfix_exporter-0.1.2::gentoo'`.
 * The complete build log is located at '/var/log/portage/app-metrics:postfix_exporter-0.1.2:20190228-205914.log'.
 * For convenience, a symlink to the build log is located at '/var/tmp/portage/app-metrics/postfix_exporter-0.1.2/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/app-metrics/postfix_exporter-0.1.2/temp/environment'.
 * Working directory: '/var/tmp/portage/app-metrics/postfix_exporter-0.1.2/work/postfix_exporter-0.1.2/src/github.com/kumina/postfix_exporter'
 * S: '/var/tmp/portage/app-metrics/postfix_exporter-0.1.2/work/postfix_exporter-0.1.2'