Build failure due to change in prometheus API
/ # go get gitlab.com/yakshaving.art/nomad-exporter
# gitlab.com/yakshaving.art/nomad-exporter
root/go/src/gitlab.com/yakshaving.art/nomad-exporter/main.go:54:29: undefined: prometheus.Handler
similar issues:
https://github.com/kumina/dovecot_exporter/issues/11 https://github.com/jonnenauha/prometheus_varnish_exporter/issues/45