From 5ed8b2d0f168494f6bfcf2b6f6c875588e17c78d Mon Sep 17 00:00:00 2001
From: Michal Sojka <michal.sojka@cvut.cz>
Date: Fri, 10 Oct 2025 15:29:21 +0200
Subject: [PATCH] kernelshark: fix build with cmake4

---
 pkgs/os-specific/linux/trace-cmd/kernelshark.nix | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/pkgs/os-specific/linux/trace-cmd/kernelshark.nix b/pkgs/os-specific/linux/trace-cmd/kernelshark.nix
index 5ab8049a50cf..003b2a006aa7 100644
--- a/pkgs/os-specific/linux/trace-cmd/kernelshark.nix
+++ b/pkgs/os-specific/linux/trace-cmd/kernelshark.nix
@@ -15,6 +15,7 @@
   freefont_ttf,
   wrapQtAppsHook,
   qtwayland,
+  fetchpatch,
 }:
 
 stdenv.mkDerivation (finalAttrs: {
@@ -26,6 +27,14 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-OT6ClyZRE+pxWwm+sfzvN3CnoCIyxcAiVsi1fdzaT4M=";
   };
 
+  patches = [
+    # kernelshark: Allow building with CMake 4+
+    (fetchpatch {
+      url = "https://lore.kernel.org/linux-trace-devel/20251010131715.1123934-1-michal.sojka@cvut.cz/raw";
+      hash = "sha256-hT+EhauFlQGjhXyq7Z9FwjS3C+0Jlz6n5BDKCXwzBCc=";
+    })
+  ];
+
   outputs = [ "out" ];
 
   nativeBuildInputs = [