submodule repos on GitHub

Richard Eisenberg rae at
Tue Jul 17 19:09:37 UTC 2018

Hi devs,

The Newcomers page ( recommends cloning GHC with

> git clone --recursive git://

I believe my students did this with success several weeks ago. But trying it again today leads to trouble with some submodules, e.g.:

> Cloning into '/Users/rae/ltemp/ghc-test/libraries/Cabal'...
> fatal: remote error: 
>   ghc/packages/Cabal is not a valid repository name
>   Email support at for help
> fatal: clone of 'git://' into submodule path '/Users/rae/ltemp/ghc-test/libraries/Cabal' failed

Is there something wrong in the internets? Or should we update the Newcomers page?


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