Re: updating many haskell packages

[Federico Beffa]

On Mon, Feb 6, 2017 at 4:23 PM, Troy Sankey <address@hidden> wrote:
> Hm, I should have been following a stackage LTS.  Maybe I wouldn't need
> to relax any dependency versions.  I also wonder if I could have avoided
> some discrepancies between hackage and released .cabal files regarding
> dependency versions (there are quite a few [0]).

As far as I know in the past NIX was aggressively removing upper
version constraints, but this seems to have led to problems and they
changed policy:
http://lists.science.uu.nl/pipermail/nix-dev/2015-January/015608.html

Having a set of compatible packages is one of the key Stackage goals
https://github.com/fpco/stackage/blob/master/MAINTAINERS.md#adding-a-package
If the project takes traction (as it seems) this problem should disappear.

I would consider a discrepancy between a cabal file on Hackage and the
actual cabal file included in a tar archive a bug.  It may be helpful
to report it to the author.

Regards,
Fede

[...]

> [0]
> https://github.com/pwnage101/guix/blob/00cc2021d9f3019c8dc69383ff2038eb54d1ba5a/gnu/packages/haskell.scm#L1375
> https://github.com/pwnage101/guix/blob/00cc2021d9f3019c8dc69383ff2038eb54d1ba5a/gnu/packages/haskell.scm#L1404
> https://github.com/pwnage101/guix/blob/00cc2021d9f3019c8dc69383ff2038eb54d1ba5a/gnu/packages/haskell.scm#L1537
> https://github.com/pwnage101/guix/blob/00cc2021d9f3019c8dc69383ff2038eb54d1ba5a/gnu/packages/haskell.scm#L1594
> https://github.com/pwnage101/guix/blob/00cc2021d9f3019c8dc69383ff2038eb54d1ba5a/gnu/packages/haskell.scm#L1944
> https://github.com/pwnage101/guix/blob/00cc2021d9f3019c8dc69383ff2038eb54d1ba5a/gnu/packages/haskell.scm#L1987
> https://github.com/pwnage101/guix/blob/00cc2021d9f3019c8dc69383ff2038eb54d1ba5a/gnu/packages/haskell.scm#L2018
> https://github.com/pwnage101/guix/blob/00cc2021d9f3019c8dc69383ff2038eb54d1ba5a/gnu/packages/haskell.scm#L5902
> https://github.com/pwnage101/guix/blob/00cc2021d9f3019c8dc69383ff2038eb54d1ba5a/gnu/packages/haskell.scm#L8793