So, assuming that upstream will accept your changes, the easiest thing to do is create a branch of D in the same on-disk location as the original code (so, $GOP

So, assuming that upstream will accept your changes, the easiest thing to do is create a branch of D in the same on-disk location as the original code (so, $GOPATH/src/github.com/D-team/D for example). You then make your modifications there... the import statements still work because they still refer to the same place on disk. Read this: http://blog.natefinch.com/2014/03/go-and-github.html http://blog.natefinch.com/2014/03/go-and-github.html