As of December 1st, 2019 Buffalo, and all related packages, require Go Modules and the use of the GOPATH is no longer supported.

Please see this blog post for more information https://blog.gobuffalo.io/the-road-to-1-0-requiring-modules-5672c6b015e5.

Videos

Buffalo: Managing Plugins

In this video Mark Bates will walk you through understanding how Buffalo Plugins work, and how to use the Buffalo Plugin Manager.

https://www.gopherguides.tv/buffalo-resources/videos/buffalo-managing-plugins