submodule repos on GitHub

[Matthew Pickering]

Did you do the line above as well?

```
git config --global url."git://github.com/ghc/packages-".insteadOf
git://github.com/ghc/packages/
```

On Tue, Jul 17, 2018 at 8:09 PM, Richard Eisenberg <rae at cs.brynmawr.edu> wrote:
> Hi devs,
>
> The Newcomers page (https://ghc.haskell.org/trac/ghc/wiki/Newcomers) recommends cloning GHC with
>
>> git clone --recursive git://github.com/ghc/ghc
>
> 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 github.com for help
>> fatal: clone of 'git://github.com/ghc/packages/Cabal.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?
>
> Thanks,
> Richard
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