From a7f554bb71ffb23513cf16e3cd4aba1be2e17e2b Mon Sep 17 00:00:00 2001
From: OPNA2608 <opna2608@protonmail.com>
Date: Fri, 14 Nov 2025 23:34:09 +0100
Subject: [PATCH] mt32emu-qt: Fix build with CMake 4

---
 pkgs/by-name/mt/mt32emu-qt/package.nix | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/pkgs/by-name/mt/mt32emu-qt/package.nix b/pkgs/by-name/mt/mt32emu-qt/package.nix
index a7eb6f529ca3..ab356671d063 100644
--- a/pkgs/by-name/mt/mt32emu-qt/package.nix
+++ b/pkgs/by-name/mt/mt32emu-qt/package.nix
@@ -24,9 +24,21 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-PqYPYnKPlnU3PByxksBscl4GqDRllQdmD6RWpy/Ura0=";
   };
 
-  postPatch = ''
-    sed -i -e '/add_subdirectory(mt32emu)/d' CMakeLists.txt
-  '';
+  postPatch =
+    # Make sure system-installed libmt32emu is used
+    # Don't depend on in-tree mt32emu to be used
+    ''
+      substituteInPlace CMakeLists.txt \
+        --replace-fail 'add_subdirectory(mt32emu)' "" \
+        --replace-fail 'add_dependencies(mt32emu-qt mt32emu)' ""
+    ''
+    # Bump CMake minimum to something our CMake supports
+    # Fixed treewide in https://github.com/munt/munt/commit/e6af0c7e5d63680716ab350467207c938054a0df
+    # Remove when version > 1.11.1
+    + ''
+      substituteInPlace CMakeLists.txt mt32emu_qt/CMakeLists.txt \
+        --replace-fail 'cmake_minimum_required(VERSION 2.8.12)' 'cmake_minimum_required(VERSION 2.8.12...3.27)'
+    '';
 
   nativeBuildInputs = [
     cmake