luarocks: fix cross-compiling

splicing is not currently working for luaPackages

TODO: fix splicing that

luarocks-aarch64-unknown-linux-gnu> /nix/store/wfkwbqp5bvipx7inf3rm4xzk2402w82i-stdenv-linux/setup: line 87: /nix/store/vbv8x2awfaa7y3fnxlpbc
jh99q31qr3j-lua-aarch64-unknown-linux-gnu-5.2.4/bin/lua: cannot execute binary file: Exec format error

pkgs/development/tools/misc/luarocks/default.nix

@@ -1,4 +1,5 @@
 {lib, stdenv, fetchFromGitHub
+, buildPackages
 , curl, makeWrapper, which, unzip
 , lua
 # for 'luarocks pack'
@@ -43,7 +44,7 @@ stdenv.mkDerivation rec {
     fi
   '';
 
-  nativeBuildInputs = [ makeWrapper installShellFiles ];
+  nativeBuildInputs = [ makeWrapper installShellFiles buildPackages.lua ];
 
   buildInputs = [ lua curl which ];
 
@@ -63,7 +64,7 @@ stdenv.mkDerivation rec {
     installShellCompletion --cmd luarocks --zsh <($out/bin/luarocks completion zsh)
   '';
 
-  propagatedBuildInputs = [ zip unzip cmake ];
+  propagatedNativeBuildInputs = [ zip unzip cmake ];
 
   # unpack hook for src.rock and rockspec files
   setupHook = ./setup-hook.sh;