From 09a03f6cfaeecae8bf5774ae371d37c4369e2da4 Mon Sep 17 00:00:00 2001
From: Damian Shaw <damian.peter.shaw@gmail.com>
Date: Sat, 15 Aug 2026 13:36:05 -0400
Subject: [PATCH] Allow flit-core 4 to build pip

---
 pyproject.toml | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/pyproject.toml b/pyproject.toml
index 48f64c8018..fe6b39913d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -45,13 +45,13 @@ Source = "https://github.com/pypa/pip"
 Changelog = "https://pip.pypa.io/en/stable/news/"
 
 [build-system]
-requires = ["flit-core >=3.11,<4"]
+requires = ["flit-core >=3.11,<5"]
 build-backend = "flit_core.buildapi"
 
 [dependency-groups]
 test = [
     "cryptography",
-    "flit-core >= 3.11, < 4",
+    "flit-core >= 3.11, < 5",
     "freezegun",
     "installer",
     # pytest-subket requires 7.0+
@@ -69,7 +69,7 @@ test = [
 ]
 
 test-common-wheels = [
-    "flit-core >= 3.11, < 4",
+    "flit-core >= 3.11, < 5",
     # We pin setuptools<80 because our test suite currently
     # depends on setup.py develop to generate egg-link files.
     "setuptools >= 70.1.0, <80",