The package golang-github-prometheus-client-model 0.0.2+git20150212.12.fa8ad6f-2 has been added to kali-rolling. It has been imported from Debian: https://tracker.debian.org/pkg/golang-github-prometheus-client-model -- More information about golang-github-prometheus-client-model: http://pkg.kali.org/pkg/golang-github-prometheus-client-model