The package golang-github-mitchellh-copystructure 0.0~git20161013.0.5af94ae-2.1 has been added to kali-rolling. It has been imported from Debian: https://tracker.debian.org/pkg/golang-github-mitchellh-copystructure -- More information about golang-github-mitchellh-copystructure: http://pkg.kali.org/pkg/golang-github-mitchellh-copystructure