From bc266953348d114ac05b861cd6d3a6dd6f406216 Mon Sep 17 00:00:00 2001
From: Robert Scott <code@humanleg.org.uk>
Date: Mon, 26 Aug 2019 14:06:28 +0100
Subject: [PATCH 1/2] poco: enable for darwin

---
 pkgs/development/libraries/poco/default.nix | 1 -
 1 file changed, 1 deletion(-)

diff --git a/pkgs/development/libraries/poco/default.nix b/pkgs/development/libraries/poco/default.nix
index 68ddf5c91d1..e766657c19a 100644
--- a/pkgs/development/libraries/poco/default.nix
+++ b/pkgs/development/libraries/poco/default.nix
@@ -28,6 +28,5 @@ stdenv.mkDerivation rec {
     description = "Cross-platform C++ libraries with a network/internet focus";
     license = licenses.boost;
     maintainers = with maintainers; [ orivej ];
-    platforms = platforms.linux;
   };
 }

From f8c2a8461e83b84c0c5a6948fdcb73d04652e162 Mon Sep 17 00:00:00 2001
From: Robert Scott <code@humanleg.org.uk>
Date: Sun, 2 Jun 2019 12:01:30 +0100
Subject: [PATCH 2/2] cctz: enable for darwin

only minor tweaks needed
---
 pkgs/development/libraries/cctz/default.nix | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/libraries/cctz/default.nix b/pkgs/development/libraries/cctz/default.nix
index 2930ffa61e3..832b070c883 100644
--- a/pkgs/development/libraries/cctz/default.nix
+++ b/pkgs/development/libraries/cctz/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub }:
+{ stdenv, fetchFromGitHub, darwin }:
 
 stdenv.mkDerivation rec {
   name = "cctz-${version}";
@@ -13,8 +13,14 @@ stdenv.mkDerivation rec {
 
   makeFlags = [ "PREFIX=$(out)" ];
 
+  buildInputs = stdenv.lib.optional stdenv.isDarwin darwin.apple_sdk.frameworks.Foundation;
+
   installTargets = [ "install_hdrs" "install_shared_lib" ];
 
+  postInstall = stdenv.lib.optionalString stdenv.isDarwin ''
+    install_name_tool -id $out/lib/libcctz.so $out/lib/libcctz.so
+  '';
+
   enableParallelBuilding = true;
 
   meta = with stdenv.lib; {