dnsproxy: fix build on darwin

pkgs/tools/networking/dnsproxy/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, buildGoModule }:
+{ stdenv, fetchFromGitHub, buildGoModule, Security }:
 
 buildGoModule rec {
   pname = "dnsproxy";
@@ -13,6 +13,8 @@ buildGoModule rec {
 
   modSha256 = "0r5ybr4gpcdsldk12b0d4xiih6ckwnqkfwy89c97prv24v14zysv";
 
+  buildInputs = stdenv.lib.optionals stdenv.isDarwin [ Security ];
+
   meta = with stdenv.lib; {
     description = "Simple DNS proxy with DoH, DoT, and DNSCrypt support";
     homepage = "https://github.com/AdguardTeam/dnsproxy";