From d82c73ce17d7610bafb0d891e32bb69f390d2111 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20=C4=8Cun=C3=A1t?= <v@cunat.cz>
Date: Fri, 22 Oct 2021 11:03:43 +0200
Subject: [PATCH] miniupnpc: fix build on darwin again

Broken by ec4a15910072 (PR #139638); I forgot darwin again.
---
 pkgs/tools/networking/miniupnpc/default.nix | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pkgs/tools/networking/miniupnpc/default.nix b/pkgs/tools/networking/miniupnpc/default.nix
index 0182440a8eb..65adb3c5eb8 100644
--- a/pkgs/tools/networking/miniupnpc/default.nix
+++ b/pkgs/tools/networking/miniupnpc/default.nix
@@ -19,7 +19,9 @@ let
 
       makeFlags = [ "PREFIX=$(out)" "INSTALLPREFIX=$(out)" ];
 
-      postInstall = ''chmod +x "$out"/lib/libminiupnpc.so'';
+      postInstall = ''
+        chmod +x "$out"/lib/libminiupnpc${stdenv.hostPlatform.extensions.sharedLibrary}
+      '';
 
       meta = with lib; {
         homepage = "http://miniupnp.free.fr/";