On: The ecosystem of the Go programming language

[q3k]

It's one `cp -r` and a 1 line change in go.mod [1]. You can also just `go mod vendor` to have all modules land in a `vendor/` directory when you can edit things as you wish [2].

[1] - https://golang.org/ref/mod#go-mod-file-replace

[2] - https://golang.org/ref/mod#vendoring