aws-vault: fix build on darwin

pkgs/tools/admin/aws-vault/default.nix

@@ -1,4 +1,4 @@
-{ buildGoModule, lib, fetchFromGitHub }:
+{ buildGoModule, stdenv, fetchFromGitHub, Security }:
 buildGoModule rec {
   pname = "aws-vault";
   version = "5.3.2";
@@ -13,13 +13,15 @@ buildGoModule rec {
   modSha256 = "1d3hjfmfmlpw2scfyn597zkzz864w97p0wrsxjp49m9mi0pgmhq9";
   subPackages = [ "." ];
 
+  buildInputs = stdenv.lib.optionals stdenv.isDarwin [ Security ];
+
   # set the version. see: aws-vault's Makefile
   buildFlagsArray = ''
     -ldflags=
     -X main.Version=v${version}
   '';
 
-  meta = with lib; {
+  meta = with stdenv.lib; {
     description =
       "A vault for securely storing and accessing AWS credentials in development environments";
     homepage = "https://github.com/99designs/aws-vault";