in https://github.com/capistrano/rvm we have rvm_map_bins in https://github.com/capistrano/rbenv we have rbenv_map_bins in https://github.com/capistrano/chruby we have chruby_map_bins Any gem that try extend this arrays , will need to have 3 `append` to be compatible with all version managers. I propose to soft deprecated the *_map_bins to ruby_map_bins . If there is an approval, i will open a PR in the all the repos that are affected.