diff --git a/pkgs/ifwait/default.nix b/pkgs/ifwait/default.nix
index ce9ba85..bc21ef4 100644
--- a/pkgs/ifwait/default.nix
+++ b/pkgs/ifwait/default.nix
@@ -25,6 +25,8 @@ in stdenv.mkDerivation rec {
     makeWrapper ${lua}/bin/lua $out/bin/${pname} \
       --prefix LUA_CPATH ";" ${netlink}/lib/lua/${lua.luaversion}/\?.so \
       --add-flags $out/lib/${pname}.lua
+    # makeWrapper adds a shebang for bash
+    sed -i -e '1c#!/bin/sh' $out/bin/${pname}
   '';
 }
 
diff --git a/pkgs/liminix-tools/networking/udhcpc.nix b/pkgs/liminix-tools/networking/udhcpc.nix
index b55a489..080f563 100644
--- a/pkgs/liminix-tools/networking/udhcpc.nix
+++ b/pkgs/liminix-tools/networking/udhcpc.nix
@@ -1,7 +1,7 @@
 {
   liminix
 , busybox
-, writeShellScript
+, writeAshScript
 , serviceFns
 } :
 let
@@ -10,7 +10,9 @@ in
 interface: { ... } @ args:
 let
   name = "${interface.device}.udhcp";
-  script = writeShellScript "udhcp-notify" ''
+  script = writeAshScript "udhcp-notify"  {
+    # runtimeInputs = [ iproute2 ] using busybox version of ip
+  } ''
     . ${serviceFns}
     action=$1