cabal sdist trouble with GHC from head

[Alan & Kim Zimmerman]

cabal has changed for HEAD, you need to install 1.21.1.0

On Thu, Oct 23, 2014 at 2:40 PM, Sven Panne <svenpanne at gmail.com> wrote:

> 2014-10-22 15:16 GMT+02:00 Sven Panne <svenpanne at gmail.com>:
> > Does anybody have a clue what's going wrong at the sdist step here?
> >
> >    https://travis-ci.org/haskell-opengl/OpenGLRaw/jobs/38707011#L104
> >
> > This only happens with a GHC from head, a build with GHC 7.8.3 is fine:
> >
> >    https://travis-ci.org/haskell-opengl/OpenGLRaw/jobs/38707010
> >
> > Any help highly appreciated...
>
> I would really need some help here, even adding a few more diagnostic
> things to the Travis CI configuration didn't give me a clue what's
> going wrong:
>
>    https://travis-ci.org/haskell-opengl/OpenGLRaw/jobs/38813449#L110
>
> I totally fail to understand why Cabal's sdist step works with every
> released compiler, but not with a GHC from head. I don't even know if
> this is a Cabal issue or a GHC issue. The relevant part from the
> Travis CI log is:
>
>    ...
>    cabal-1.18 sdist --verbose=3
>    creating dist/src
>    creating dist/src/sdist.-3586/OpenGLRaw-1.5.0.0
>    Using internal setup method with build-type Simple and args:
>
>  ["sdist","--verbose=3","--builddir=dist","--output-directory=dist/src/sdist.-3586/OpenGLRaw-1.5.0.0"]
>    cabal-1.18: dist/setup-config: invalid argument
>    The command "cabal-1.18 sdist --verbose=3" exited with 1.
>    ...
>
> As can be seen from the log, dist/setup-config is there and can be
> accessed.
>
> Confused,
>    S.
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