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build-system/haskell: Fix regression in "cabal-revision" input handling.

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Previously, (assoc-ref ...) would return a one-element list, leading to
an evaluation error while building the package ("wrong type to apply").

Regression introduced in 7d873f194ca69d6096d28d7a224ab78e83e34fe1.

Reported by Marius Bakke.

* guix/build-system/haskell.scm (haskell-build)[builder]: Adjust
argument to #:cabal-revision.
This commit is contained in:
Ludovic Courtès 2021-07-27 15:04:41 +02:00
parent c0cd8b7614
commit a0f880afea
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1 changed files with 9 additions and 1 deletions
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guix/build-system/haskell.scm
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@ -147,7 +147,15 @@ provides a 'Setup.hs' file as its build system."
#$(with-build-variables inputs outputs
#~(haskell-build #:name #$name
#:source #+source
#:cabal-revision #$(assoc-ref inputs "cabal-revision")
;; XXX: INPUTS contains <gexp-input> records as
;; opposed to raw lowerable objects, hence the
;; use of ungexp-splicing.
#:cabal-revision
#$@(match (assoc-ref inputs "cabal-revision")
(#f '())
(lst lst))
#:configure-flags #$configure-flags
#:extra-directories #$extra-directories
#:extra-directories #$extra-directories