From 7afe4f1df070f0f63fd1bc1158109dbc8fe3dfef Mon Sep 17 00:00:00 2001
From: John Ericson <John.Ericson@Obsidian.Systems>
Date: Thu, 10 May 2018 13:06:09 -0400
Subject: [PATCH] libpng: Remove stale crossAttrs

Random ancient stuff for Darwin cross that seems not worth it.
---
 pkgs/development/libraries/libpng/12.nix | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/pkgs/development/libraries/libpng/12.nix b/pkgs/development/libraries/libpng/12.nix
index 457f99ef13bd..01a828f95da5 100644
--- a/pkgs/development/libraries/libpng/12.nix
+++ b/pkgs/development/libraries/libpng/12.nix
@@ -18,11 +18,6 @@ stdenv.mkDerivation rec {
 
   passthru = { inherit zlib; };
 
-  crossAttrs = stdenv.lib.optionalAttrs (hostPlatform.libc == "libSystem") {
-    propagatedBuildInputs = [];
-    passthru = {};
-  };
-
   configureFlags = "--enable-static";
 
   postInstall = ''mv "$out/bin" "$dev/bin"'';