[bug#68315] [PATCH 34/48] build-system: python: Redefine python-build.

[Nicolas Graves]

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

Change-Id: I1d270fa64192394072279f73ae0d77877d41f01c
---
 guix/build-system/python.scm | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/guix/build-system/python.scm b/guix/build-system/python.scm
index cca009fb28..365d216592 100644
--- a/guix/build-system/python.scm
+++ b/guix/build-system/python.scm
@@ -3,6 +3,7 @@
 ;;; Copyright © 2013 Andreas Enge <andreas@enge.fr>
 ;;; Copyright © 2013 Nikita Karetnikov <nikita@karetnikov.org>
 ;;; Copyright © 2021 Lars-Dominik Braun <lars@6xq.net>
+;;; Copyright © 2024 Nicolas Graves <ngraves@ngraves.fr>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -182,7 +183,7 @@ (define* (python-build name inputs
                                   (guix build utils))))
   "Build SOURCE using PYTHON, and with INPUTS.  This assumes that SOURCE
 provides a 'setup.py' file as its build system."
-  (define build
+  (define builder
     (with-imported-modules imported-modules
       #~(begin
           (use-modules #$@(sexp->gexp modules))
@@ -205,13 +206,8 @@ (define build
                               #:inputs %build-inputs)))))
 
 
-  (mlet %store-monad ((guile (package->derivation (or guile (default-guile))
-                                                  system #:graft? #f)))
-    (gexp->derivation name build
-                      #:system system
-                      #:graft? #f                 ;consistent with 'gnu-build'
-                      #:target #f
-                      #:guile-for-build guile)))
+  (mbegin %store-monad
+    (return builder)))
 
 (define python-build-system
   (build-system
-- 
2.41.0