Use local variable inside instance variablels

[tomiacannondale]

I use this gem for provisioning my local environment.
I use install::user instead install::system .

But I can not install anyenv.
Because @username is not defined inside block of execute method.

example

def hoge
  # @username is defined
  # self is Itamae::Recipe::EvalContext
  execute "install" do
    # @username is not defined
    # self is Itamae::Resource::Base::EvalContext
  end
end