From 779cca7f860f80cc9710c11ec992d05fe22e12f3 Mon Sep 17 00:00:00 2001
From: Timo Gottszky <timogottszky+git@gmail.com>
Date: Wed, 10 Jun 2026 13:05:45 +0200
Subject: [PATCH] python3Packages.railroad-diagrams: migrate to pyproject

---
 .../development/python-modules/railroad-diagrams/default.nix | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/python-modules/railroad-diagrams/default.nix b/pkgs/development/python-modules/railroad-diagrams/default.nix
index 48237e069767..72700efb323b 100644
--- a/pkgs/development/python-modules/railroad-diagrams/default.nix
+++ b/pkgs/development/python-modules/railroad-diagrams/default.nix
@@ -2,12 +2,13 @@
   lib,
   buildPythonPackage,
   fetchPypi,
+  setuptools,
 }:
 
 buildPythonPackage (finalAttrs: {
   pname = "railroad-diagrams";
   version = "3.0.1";
-  format = "setuptools";
+  pyproject = true;
 
   __structuredAttrs = true;
 
@@ -16,6 +17,8 @@ buildPythonPackage (finalAttrs: {
     hash = "sha256-qRMyuskAyzw2czH6m2mfCJe8+GtyZPZUWGdd9DDQTOM=";
   };
 
+  build-system = [ setuptools ];
+
   # This is a dependency of pyparsing, which is a dependency of pytest
   doCheck = false;