Legacy buildpacks initially intended for Heroku do not work out of the box with buildpacks.iopack build command.
Buildpacker makes all the old Heroku buildpacks work out of the box with the newest pack build command,
all you have to do is call buildpacker build instead and buildpacker invokes pack build for you.
Features
Git references with versioning https://github.com/heroku/heroku-buildpack-go.git#v149