An idea suggested by @steebchen is to use //go:generate go run github.com/google/wire/cmd/wire as the automatically inserted generate line for Wire output. This would have the advantage of always using a version of the code generator that's the same as the library being used, at the cost of perhaps some running time.

EDIT (Hit send too early) I don't think we want to make this change until Go Modules is the default, thus I'm marking this issue blocked.