From 3e43d42f87388db13783701993e96f115501cd27 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20=C4=8Cun=C3=A1t?= <v@cunat.cz>
Date: Sun, 16 May 2021 09:31:27 +0200
Subject: [PATCH] ffmpeg_4: only apply the patch on darwin

It's not a big deal, but why rebuild the linux dependencies now.
---
 pkgs/development/libraries/ffmpeg/4.nix | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/libraries/ffmpeg/4.nix b/pkgs/development/libraries/ffmpeg/4.nix
index 3a1b1c489c07..df3d0732393e 100644
--- a/pkgs/development/libraries/ffmpeg/4.nix
+++ b/pkgs/development/libraries/ffmpeg/4.nix
@@ -1,6 +1,7 @@
 { callPackage
 # Darwin frameworks
 , Cocoa, CoreMedia, VideoToolbox
+, stdenv, lib
 , ...
 }@args:
 
@@ -11,5 +12,6 @@ callPackage ./generic.nix (rec {
   darwinFrameworks = [ Cocoa CoreMedia VideoToolbox ];
 
   /* Work around https://trac.ffmpeg.org/ticket/9242 */
-  patches = [ ./v2-0001-avcodec-videotoolboxenc-define-TARGET_CPU_ARM64-t.patch ];
+  patches = lib.optional stdenv.isDarwin
+    ./v2-0001-avcodec-videotoolboxenc-define-TARGET_CPU_ARM64-t.patch;
 } // args)