diff --git a/pkgs/applications/video/mpv/default.nix b/pkgs/applications/video/mpv/default.nix
index d2f8993bc2f8..68bb464dcff9 100644
--- a/pkgs/applications/video/mpv/default.nix
+++ b/pkgs/applications/video/mpv/default.nix
@@ -141,11 +141,6 @@ stdenv.mkDerivation (finalAttrs: {
     ''
   ];
 
-  # Ensure we reference 'lib' (not 'out') of Swift.
-  preConfigure = lib.optionalString stdenv.hostPlatform.isDarwin ''
-    export SWIFT_LIB_DYNAMIC="${lib.getLib swift.swift}/lib/swift/macosx"
-  '';
-
   mesonFlags = [
     (lib.mesonOption "default_library" "shared")
     (lib.mesonBool "libmpv" true)