[Haskell-beginners] LTS is good but...

[Michael Snoyman]

Funny that there's an issue being discussed in the cabal issue tracker
right now[1] similar to this. But the report you're giving here is
particularly strange. Cabal-1.16 implies that you're using GHC 7.6, which
is supported by the claim that base 4.7 isn't available. I'd recommend
starting off with running the following commands and pasting the output:

ghc --version
which ghc
cabal --version
which cabal

[1] https://github.com/haskell/cabal/issues/2438

On Tue, Mar 3, 2015 at 10:21 PM emacstheviking <objitsu at gmail.com> wrote:

> Forgot to add that somehow, despite the upgrade, my cabal version has gone
> backwards from 1.20.0.1 to 1.16.0
>
> WTF?
>
>
> On 3 March 2015 at 20:19, emacstheviking <objitsu at gmail.com> wrote:
>
>> I started an OpenGL project within an LTS sandbox as guided on another
>> post and, somewhat foolishly it would see, I did a "cabal install
>> cabal-install" when prompted that a new version was available.
>>
>> The very next time I tried to work on my code.... I got this:
>>
>> bash-3.2$ pwd
>> /Users/seancharles/Documents/Coding/haskell/lts1
>> bash-3.2$ cabal build
>> cabal: You need to re-run the 'configure' command. The version of Cabal
>> being
>> used has changed (was Cabal-1.20.0.1, now Cabal-1.16.0).
>> bash-3.2$ cabal configure
>> Resolving dependencies...
>> Configuring lts1-0.1.0.0...
>> cabal: At least the following dependencies are missing:
>> base ==4.7.*
>> bash-3.2$ cabal build
>> cabal: You need to re-run the 'configure' command. The version of Cabal
>> being
>> used has changed (was Cabal-1.20.0.1, now Cabal-1.16.0).
>> bash-3.2$ ls -l
>> total 112
>> -rw-r--r--  1 seancharles  staff     19 Mar  2 12:53 LICENCSE
>> -rw-r--r--  1 seancharles  staff    552 Mar  3 20:09 Main.hs
>> -rw-r--r--  1 seancharles  staff    477 Mar  3 20:07 Main.hs~
>> -rw-r--r--  1 seancharles  staff     46 Mar  2 12:52 Setup.hs
>> -rw-r--r--  1 seancharles  staff  30198 Mar  2 12:51 cabal.config
>> -rw-r--r--  1 seancharles  staff   1090 Mar  2 12:51 cabal.sandbox.config
>> drwxr-xr-x  5 seancharles  staff    170 Mar  2 12:53 dist
>> -rw-r--r--  1 seancharles  staff   1932 Mar  2 12:52 lts1.cabal
>> bash-3.2$
>>
>> So, welcome to a different kind of hell, "cabal version hell" perhaps?
>>
>> Can anybody help me get it running again?
>> Thanks.
>> Sean.
>>
>>
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