From 5b8b9a08e7e39ecec9dab658cd0fd28fa586c8cb Mon Sep 17 00:00:00 2001
From: Vincent Laporte <Vincent.Laporte@gmail.com>
Date: Sun, 16 Sep 2018 06:24:49 +0000
Subject: [PATCH] pythonPackages.libnacl: fix build on darwin

---
 pkgs/development/python-modules/libnacl/default.nix | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/pkgs/development/python-modules/libnacl/default.nix b/pkgs/development/python-modules/libnacl/default.nix
index a8acb4dc9696fab..c575e5594be341f 100644
--- a/pkgs/development/python-modules/libnacl/default.nix
+++ b/pkgs/development/python-modules/libnacl/default.nix
@@ -14,8 +14,9 @@ buildPythonPackage rec {
   buildInputs = [ pytest ];
   propagatedBuildInputs = [ libsodium ];
 
-  postPatch = ''
-    substituteInPlace "./libnacl/__init__.py" --replace "ctypes.cdll.LoadLibrary('libsodium.so')" "ctypes.cdll.LoadLibrary('${libsodium}/lib/libsodium.so')"
+  postPatch =
+    let soext = stdenv.hostPlatform.extensions.sharedLibrary; in ''
+    substituteInPlace "./libnacl/__init__.py" --replace "ctypes.cdll.LoadLibrary('libsodium${soext}')" "ctypes.cdll.LoadLibrary('${libsodium}/lib/libsodium${soext}')"
   '';
 
   checkPhase = ''
@@ -27,6 +28,6 @@ buildPythonPackage rec {
     description = "Python bindings for libsodium based on ctypes";
     homepage = https://pypi.python.org/pypi/libnacl;
     license = licenses.asl20;
-    platforms = platforms.linux;
+    platforms = platforms.unix;
   };
 }