mtl-2.1 severly broken, cabal needs blacklisting

Henning Thielemann lemming at
Tue Nov 13 20:03:08 CET 2012

On Tue, 13 Nov 2012, Bas van Dijk wrote:

> On 13 November 2012 17:27, Andreas Abel <andreas.abel at> wrote:
>> This calls for a means of blacklisting broken or malicious packages.
>>   cabal update
>> should also pull a blacklist of packages that will never be selected by
>> cabal install (except maybe by explicit user safety overriding).
> Maybe we can use the existing preferred-versions file that cabal-install uses:

It is also possible to deprecate a package. Is it possible to deprecate a 
single version? I'm afraid that the user is also not warned if he installs 
a deprecated package.

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