From d91de2a5bec7e45da3d3d5869e14033df70c24d5 Mon Sep 17 00:00:00 2001
From: Sharlatan Hellseher <sharlatanus@gmail.com>
Date: Mon, 4 Aug 2025 22:38:23 +0100
Subject: gnu: python-flex: Switch to pyproject-build-system.

* gnu/packages/python-xyz.scm (python-flex): Add a maintenance note to
  remove the packages in the future.
  [build-system]: Use pyproject.
  [arguments] <tests?>: No tests in PyPI archive provided.
  [native-inputs]: Add python-seuptools.

Change-Id: I61cb165c089a97514ead78317158f21591003c32
---
 gnu/packages/python-xyz.scm | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/python-xyz.scm b/gnu/packages/python-xyz.scm
index bb37756b68..15f3eccd35 100644
--- a/gnu/packages/python-xyz.scm
+++ b/gnu/packages/python-xyz.scm
@@ -27349,6 +27349,9 @@ input.")
      address is valid and really exists.")
     (license license:lgpl3+)))
 
+;; XXX: Project has no updates since 2019, consider to remove when nothing
+;; depends on it in the next refresh cycle.
+;; See: <https://github.com/pipermerriam/flex/issues/237>.
 (define-public python-flex
   (package
     (name "python-flex")
@@ -27360,7 +27363,10 @@ input.")
       (sha256
        (base32
         "1sr91f5sqywj4040jm3cq4333fp8hbmmr7v6v05a3h0sgyixcbi9"))))
-    (build-system python-build-system)
+    (build-system pyproject-build-system)
+    (arguments (list #:tests? #f)) ;no tests in PyPI archive
+    (native-inputs
+     (list python-setuptools))
     (propagated-inputs
      (list python-click
            python-jsonpointer
-- 
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