From d91e3506eeb7705f49b0eef6deac5c112f6e1554 Mon Sep 17 00:00:00 2001
From: Robert Rose <robert.rose@mailbox.org>
Date: Fri, 6 Mar 2026 10:33:12 +0100
Subject: [PATCH] v4l2loopback: use substituteInPlace --replace-fail

---
 pkgs/os-specific/linux/v4l2loopback/default.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/os-specific/linux/v4l2loopback/default.nix b/pkgs/os-specific/linux/v4l2loopback/default.nix
index 418efb57d438..475c212fd67e 100644
--- a/pkgs/os-specific/linux/v4l2loopback/default.nix
+++ b/pkgs/os-specific/linux/v4l2loopback/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
   ];
 
   preBuild = ''
-    substituteInPlace Makefile --replace "modules_install" "INSTALL_MOD_PATH=$out modules_install"
+    substituteInPlace Makefile --replace-fail "modules_install" "INSTALL_MOD_PATH=$out modules_install"
     sed -i '/depmod/d' Makefile
   '';