When changing a glide.yaml file to indicate where to get alternate resources other then a repo's master branch glide.yaml is unable to pull in these directories into vendor due to error "cannot detect VCS". This problem is fixed when you delete the cache in ~/.glide file. I think it would be wise to acknowledge that this could be a quick fix i.e change error from "cannot detect VCS" to "cannot detect VCS try deleting your glide cache within ~/.glide.
When changing a glide.yaml file to indicate where to get alternate resources other then a repo's master branch glide.yaml is unable to pull in these directories into vendor due to error "cannot detect VCS". This problem is fixed when you delete the cache in ~/.glide file. I think it would be wise to acknowledge that this could be a quick fix i.e change error from "cannot detect VCS" to "cannot detect VCS try deleting your glide cache within ~/.glide.