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[bug#51655] [PATCH] build-system: haskell: Add ‘package-with-explicit-ha
From: |
zimoun |
Subject: |
[bug#51655] [PATCH] build-system: haskell: Add ‘package-with-explicit-haskell’ procedure. |
Date: |
Sun, 19 Dec 2021 10:23:05 +0100 |
Hi,
On Sun, 19 Dec 2021 at 09:47, Xinglu Chen <public@yoctocell.xyz> wrote:
>>> +@lisp
>>> +(use-modules (guix build-system haskell))
>>> +
>>> +(define (default-haskell-8.8)
>>> + ;; Lazily resolve the binding to avoid a circular dependency.
>>> + (let ((haskell (resolve-interface '(gnu packages haskell))))
>>> + (module-ref haskell 'ghc-8.8)))
>>> +
>>> +(define package-with-haskell-8.8
>>> + (package-with-explicit-haskell (delay (default-haskell-8.8))
>>> + "ghc-" "ghc-8.8-"
>>> + #:variant-property 'ghc-8.8-variant))
>>> +@end lisp
>>
>> As Lars said, an instance is missing, IMHO.
>
> Not sure what you are referring to here, what exactly do you mean with
> “instance”?
For example, something as:
(package-with-haskell-8.8 hledger)
Cheers,
simon