Remove unnecessary rec{s from "my" packages

pkgs/tools/networking/hans/default.nix

@@ -1,7 +1,7 @@
 { stdenv, fetchFromGitHub, nettools }:
 
 let version = "0.4.4"; in
-stdenv.mkDerivation rec {
+stdenv.mkDerivation {
   name = "hans-${version}";
 
   src = fetchFromGitHub {
@@ -29,7 +29,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ nettools ];
 
   postPatch = ''
-    substituteInPlace src/tun.cpp --replace "/sbin/" "/${nettools}/bin/"
+    substituteInPlace src/tun.cpp --replace "/sbin/" "${nettools}/bin/"
   '';
 
   enableParallelBuilding = true;