From 6be9bf1bd8f2595f3658b53e43fdff9078eff015 Mon Sep 17 00:00:00 2001
From: Emily <vcs@emily.moe>
Date: Tue, 16 Sep 2025 16:19:12 +0100
Subject: [PATCH] librdf_raptor2: fix build with CMake 4

Co-authored-by: K900 <me@0upti.me>
---
 pkgs/development/libraries/librdf/raptor2.nix | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/pkgs/development/libraries/librdf/raptor2.nix b/pkgs/development/libraries/librdf/raptor2.nix
index baad5320b250..a8d63d13125a 100644
--- a/pkgs/development/libraries/librdf/raptor2.nix
+++ b/pkgs/development/libraries/librdf/raptor2.nix
@@ -54,6 +54,16 @@ stdenv.mkDerivation rec {
     libxslt
   ];
 
+  # Fix the build with CMake 4.
+  #
+  # See: <https://github.com/dajobe/raptor/issues/75>
+  postPatch = ''
+    substituteInPlace CMakeLists.txt \
+      --replace-fail \
+        'CMAKE_MINIMUM_REQUIRED(VERSION 2.8.7)' \
+        'CMAKE_MINIMUM_REQUIRED(VERSION 3.10)'
+  '';
+
   meta = {
     description = "RDF Parser Toolkit";
     mainProgram = "rapper";