Subject: [bug#79224] [PATCH 21/43] build-system: haskell: Redefine haskell-build.

From: Nicolas Graves <[email-masked]>
Date: Tue, 12 Aug 2025 11:04:29 +0200

* guix/build-system/haskell.scm
(haskell-build): Monadic procedure returns a gexp instead of a derivation.

Change-Id: Iaa4e6af7a69a9bd2710572054b1f304a7701f113
---
 guix/build-system/haskell.scm | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/guix/build-system/haskell.scm b/guix/build-system/haskell.scm
index b0019dd0144..f734584cf5b 100644
--- a/guix/build-system/haskell.scm
+++ b/guix/build-system/haskell.scm
@@ -4,6 +4,7 @@
 ;;; Copyright © 2020 Simon Tournier <[email-masked]>
 ;;; Copyright © 2021 Ludovic Courtès <[email-masked]>
 ;;; Copyright © 2021 Xinglu Chen <[email-masked]>
+;;; Copyright © 2024 Nicolas Graves <[email-masked]>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -178,11 +179,8 @@ (define builder
                                                        search-paths))
                                #:inputs #$(input-tuples->gexp inputs))))))
 
-  (mlet %store-monad ((guile (package->derivation (or guile (default-guile))
-                                                  system #:graft? #f)))
-    (gexp->derivation name builder
-                      #:system system
-                      #:guile-for-build guile)))
+  (mbegin %store-monad
+    (return builder)))
 
 (define haskell-build-system
   (build-system
-- 
2.50.1