with import <nixpkgs> {};

pkgs.writeShellScriptBin "nix-cmd" ''
	#!/bin/sh
	pkg="''${@:1:1}"
	rest="''${@:2}"
	if [ "$rest" = "" ] ; then
	  rest="$pkg"
	fi
	exec nix-shell -p $pkg --run "$(echo "$rest" | sed -E "s/^_ /$pkg /")"
''