1 files changed, 10 insertions, 3 deletions
diff --git a/pkgs/development/libraries/libpng/12.nix b/pkgs/development/libraries/libpng/12.nix
index 031e2aa1a914..ff04c7181df5 100644
--- a/pkgs/development/libraries/libpng/12.nix
+++ b/pkgs/development/libraries/libpng/12.nix
@@ -1,13 +1,13 @@
 { stdenv, fetchurl, zlib, xz }:
 
-assert zlib != null;
+assert !(stdenv ? cross) -> zlib != null;
 
 stdenv.mkDerivation rec {
-  name = "libpng-1.2.50";
+  name = "libpng-1.2.51";
 
   src = fetchurl {
     url = "mirror://sourceforge/libpng/${name}.tar.xz";
-    sha256 = "1rz8v3cvy1zzpagxn91lj8swb9vf75rz3yyi18v7zb4jihgzh927";
+    sha256 = "0jkdlmnvn72jwm94dp98pznm9fy7alvcr2zpfh2dgbr2n09vimy7";
   };
 
   propagatedBuildInputs = [ zlib ];
@@ -16,6 +16,13 @@ stdenv.mkDerivation rec {
 
   passthru = { inherit zlib; };
 
+  crossAttrs = stdenv.lib.optionalAttrs (stdenv.cross.libc == "libSystem") {
+    propagatedBuildInputs = [];
+    passthru = {};
+  };
+
+  configureFlags = "--enable-static";
+
   meta = {
     description = "The official reference implementation for the PNG file format";
     homepage = http://www.libpng.org/pub/png/libpng.html;