Ah. This does answer my question. Thanks.

On Mon, Jun 24, 2019, 10:09 AM Herbert Valerio Riedel <hvriedel@gmail.com> wrote:
On Mon, Jun 24, 2019 at 4:03 PM chessai . <chessai1996@gmail.com> wrote:
Could we mirror transformers from darcshub to GitHub?

Not sure if this answers your question, but I set up such a darcs->git mirror years ago on http://git.haskell.org/darcs-mirrors/transformers.git to be used as upstream repo for  GHC's actual submodule http://git.haskell.org/packages/transformers.git  (which needs to be a separate repo for reasons), and which is the source of the GitHub mirror https://github.com/ghc/packages-transformers