From 1b26b41be720177dc335117ad59ab115db3db010 Mon Sep 17 00:00:00 2001
From: Randy Eckenrode <randy@largeandhighquality.com>
Date: Tue, 25 Jul 2023 17:58:02 -0400
Subject: [PATCH] mpv: enable Swift support on x86_64-darwin
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Swift support doesn’t seem to work with back-deployed dylibs, so set the
deployment target to 10.15 to force Swift to link against the system
Swift libraries. The change to use the Swift stdenv fixes the errors
reported in #214944.
---
 pkgs/applications/video/mpv/default.nix | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/pkgs/applications/video/mpv/default.nix b/pkgs/applications/video/mpv/default.nix
index 70aaa32526e7..b93d7d6606c4 100644
--- a/pkgs/applications/video/mpv/default.nix
+++ b/pkgs/applications/video/mpv/default.nix
@@ -67,7 +67,7 @@
 , sdl2Support        ? true,           SDL2
 , sixelSupport       ? false,          libsixel
 , speexSupport       ? true,           speex
-, swiftSupport       ? stdenv.isDarwin && stdenv.isAarch64, swift
+, swiftSupport       ? stdenv.isDarwin, swift
 , theoraSupport      ? true,           libtheora
 , vaapiSupport       ? x11Support || waylandSupport, libva
 , vapoursynthSupport ? false,          vapoursynth
@@ -82,7 +82,20 @@ let
   inherit (darwin.apple_sdk_11_0.frameworks)
     AVFoundation CoreFoundation CoreMedia Cocoa CoreAudio MediaPlayer Accelerate;
   luaEnv = lua.withPackages (ps: with ps; [ luasocket ]);
-in stdenv.mkDerivation (finalAttrs: {
+
+  overrideSDK = platform: version:
+    platform // lib.optionalAttrs (platform ? darwinMinVersion) {
+      darwinMinVersion = version;
+    };
+
+  stdenv' = if swiftSupport && stdenv.isDarwin && stdenv.isx86_64
+    then stdenv.override (old: {
+      buildPlatform = overrideSDK old.buildPlatform "10.15";
+      hostPlatform = overrideSDK old.hostPlatform "10.15";
+      targetPlatform = overrideSDK old.targetPlatform "10.15";
+    })
+    else stdenv;
+in stdenv'.mkDerivation (finalAttrs: {
   pname = "mpv";
   version = "0.35.1";