From 6807ea7973ce6b099761295c497357d7e6866f43 Mon Sep 17 00:00:00 2001
From: Ben Gamari <ben@smart-cactus.org>
Date: Fri, 19 Jan 2024 14:14:42 -0500
Subject: [PATCH] linuxptp: Fix cross-compilation

Linux-PTP uses a kernel-like build system which requires that the
`CROSS_COMPILE` variable be set to the target prefix when
cross-compiling.
---
 pkgs/os-specific/linux/linuxptp/default.nix | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/pkgs/os-specific/linux/linuxptp/default.nix b/pkgs/os-specific/linux/linuxptp/default.nix
index 27a9ccb3303f..de215024555d 100644
--- a/pkgs/os-specific/linux/linuxptp/default.nix
+++ b/pkgs/os-specific/linux/linuxptp/default.nix
@@ -15,7 +15,10 @@ stdenv.mkDerivation rec {
        '/usr/include/linux/' "${linuxHeaders}/include/linux/"
   '';
 
-  makeFlags = [ "prefix=" ];
+  makeFlags = [
+    "prefix="
+    "CROSS_COMPILE=${stdenv.cc.targetPrefix}"
+  ];
 
   preInstall = ''
     export DESTDIR=$out