[Haskell-cafe] Trouble installing example code for Parallel and Concurrent Programming in Haskell

[Brandon Allbery]

It has restrictive bounds on `base` (which secretly means ghc). You can try
`--allow-newer` to see if it works with newer versions.

On Fri, Nov 10, 2023 at 9:55 AM David Banas <capn.freako at gmail.com> wrote:

> I just picked up a copy of “Parallel and Concurrent Programming in
> Haskell”.
> And I’m trying to follow the instructions on p.4 for getting the examples
> installed, but having trouble:
>
> [23-11-10 9:49] dbanas at Davids-Air-M2:~/prj
> % cabal unpack parconc-examples
> Downloading  parconc-examples-0.4.8
> Downloaded   parconc-examples-0.4.8
> Unpacking to parconc-examples-0.4.8/
>
> [23-11-10 9:50] dbanas at Davids-Air-M2:~/prj
> % pushd parconc-examples-0.4.8
> ~/prj/parconc-examples-0.4.8 ~/prj ~
>
> [23-11-10 9:50] dbanas at Davids-Air-M2:~/prj/parconc-examples-0.4.8
> % cabal install --only-dependencies
> cabal: Could not resolve dependencies:
> [__0] trying: parconc-examples-0.4.8 (user goal)
> [__1] next goal: base (dependency of parconc-examples)
> [__1] rejecting: base-4.17.2.0/installed-4.17.2.0 (conflict:
> parconc-examples
> => base>=4.5 && <4.14)
> [__1] skipping: base-4.19.0.0, base-4.18.1.0, base-4.18.0.0, base-4.17.2.0,
> base-4.17.1.0, base-4.17.0.0, base-4.16.4.0, base-4.16.3.0, base-4.16.2.0,
> base-4.16.1.0, base-4.16.0.0, base-4.15.1.0, base-4.15.0.0, base-4.14.3.0,
> base-4.14.2.0, base-4.14.1.0, base-4.14.0.0 (has the same characteristics
> that
> caused the previous version to fail: excluded by constraint '>=4.5 &&
> <4.14'
> from 'parconc-examples')
> [__1] rejecting: base-4.13.0.0, base-4.12.0.0, base-4.11.1.0,
> base-4.11.0.0,
> base-4.10.1.0, base-4.10.0.0, base-4.9.1.0, base-4.9.0.0, base-4.8.2.0,
> base-4.8.1.0, base-4.8.0.0, base-4.7.0.2, base-4.7.0.1, base-4.7.0.0,
> base-4.6.0.1, base-4.6.0.0, base-4.5.1.0, base-4.5.0.0, base-4.4.1.0,
> base-4.4.0.0, base-4.3.1.0, base-4.3.0.0, base-4.2.0.2, base-4.2.0.1,
> base-4.2.0.0, base-4.1.0.0, base-4.0.0.0, base-3.0.3.2, base-3.0.3.1
> (constraint from non-upgradeable package requires installed instance)
> [__1] fail (backjumping, conflict set: base, parconc-examples)
> After searching the rest of the dependency tree exhaustively, these were
> the
> goals I've had most trouble fulfilling: base, parconc-examples
>
> Thanks,
> -db
>
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-- 
brandon s allbery kf8nh
allbery.b at gmail.com
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