[Nix-dev] HaskellNG and taffybar

[Mateusz Kowalczyk]

On 02/24/2015 05:14 PM, Benno Fünfstück wrote:
> Nixpkgs contains a patched ghc-paths package that allows you to specify the
> path to ghc at runtime using the NIX_GHC environment variable.

This didn't end up working well and dyre's master instead just runs GHC
from PATH which also is not great. There is now a patch in nixpkgs that
makes dyre itself look in NIX_GHC just like XMonad does and I have made
a simple wrapper for Yi which uses this and it works great. I'll be
replacing yiCustom that's currently in nixpkgs with new one later today.

> Luke Clifton <ltclifton at gmail.com> schrieb am Di., 24. Feb. 2015 03:12:
> 
>> This is also a problem with the Yi editor which also uses Dyre.
>>
>>
>> On 24 February 2015 at 04:18, Kirill Elagin <kirelagin at gmail.com> wrote:
>>
>>> Well, the author of the issue I pointed out is correct in saying that
>>> they use Dyre which in turn uses ghc-paths. I checked ghc-paths and I
>>> believe what they do is store the path to GHC _they were compiled with_.
>>>
>>> So errr... Looks like we are stuck in a loop. I guess your best bet is to
>>> patch Dyre not to use ghc-paths.
>>>
>>> On Mon Feb 23 2015 at 23:59:51 Arseniy Seroka <ars.seroka at gmail.com>
>>> wrote:
>>>
>>>>
>>>> 2015-02-23 22:55 GMT+03:00 Kirill Elagin <kirelagin at gmail.com>:
>>>>
>>>>> Does XMonad work in your case?
>>>>> Can you import `System.Taffybar` in `ghci`?
>>>>>
>>>>
>>>> Yes, xmonad works and I can import `System.Taffybar` in ghci.
>>>>
>>>>
>>>> Might it be that, unlike XMonad, they do something more complicated to
>>>>> invoke GHC? I didn’t check the source, but looks like they do.
>>>>> Are you running this on a non-NixOS distro? In that case, the issue
>>>>> <https://github.com/simonmar/ghc-paths/issues/4> probably explains
>>>>> what’s going
>>>>>
>>>>
>>>> I'm using Nixos.
>>>> That's what they are doing. [1]
>>>>
>>>> [1] https://github.com/travitch/taffybar/blob/master/src/
>>>> System/Taffybar.hs#L204
>>>>
>>>>
>>>> --
>>>> Sincerely,
>>>> Arseniy Seroka
>>>

-- 
Mateusz K.