From 2a8b17f1d5bef1f03e4769cf2d6802261d1315c7 Mon Sep 17 00:00:00 2001
From: Olivia Lee <olivia@computer.surgery>
Date: Tue, 22 Apr 2025 15:11:18 -0700
Subject: [PATCH] glmark2: don't overwrite LD_LIBRARY_PATH from environment

For driver development, I usually point LD_LIBRARY_PATH at an
install-dir from an in-progress mesa checkout. Clearing the previous
LD_LIBRARY_PATH value breaks this, and causes glmark2 to attempt to use
the system drivers.
---
 pkgs/by-name/gl/glmark2/package.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/by-name/gl/glmark2/package.nix b/pkgs/by-name/gl/glmark2/package.nix
index 1ba60f3588c4..9dffc8e1e928 100644
--- a/pkgs/by-name/gl/glmark2/package.nix
+++ b/pkgs/by-name/gl/glmark2/package.nix
@@ -55,7 +55,7 @@ stdenv.mkDerivation rec {
   postInstall = ''
     for binary in $out/bin/glmark2*; do
       wrapProgram $binary \
-        --set LD_LIBRARY_PATH ${libGL}/lib
+        --prefix LD_LIBRARY_PATH ":" ${libGL}/lib
     done
   '';