diff --git a/pkgs/tools/networking/wireguard-tools/default.nix b/pkgs/tools/networking/wireguard-tools/default.nix
index 4f71d6bc2e4..3f1949d4bb6 100644
--- a/pkgs/tools/networking/wireguard-tools/default.nix
+++ b/pkgs/tools/networking/wireguard-tools/default.nix
@@ -13,8 +13,8 @@ stdenv.mkDerivation rec {
 
   sourceRoot = "source/src/tools";
 
-  nativeBuildInputs = [ (optional stdenv.isDarwin makeWrapper) ];
-  buildInputs = [ (optional stdenv.isLinux libmnl) ];
+  nativeBuildInputs = optional stdenv.isDarwin makeWrapper;
+  buildInputs = optional stdenv.isLinux libmnl;
 
   makeFlags = [
     "DESTDIR=$(out)"