The package golang-gopkg-retry.v1 0.0~git20161025.0.c09f6b8-1.1 has been added to kali-rolling. It has been imported from Debian: https://tracker.debian.org/pkg/golang-gopkg-retry.v1 -- More information about golang-gopkg-retry.v1: http://pkg.kali.org/pkg/golang-gopkg-retry.v1