A module X in file /project/lib/x.ex has the following module metadata:

iex(7)> X.module_info()
[
  module: X,
  exports: [__info__: 1, foo: 0, module_info: 0, module_info: 1],
  attributes: [vsn: [259318855844826186809719652690816251721]],
  compile: [
    version: '7.3.1',
    options: [:dialyzer, :no_spawn_compiler_process, :from_core,
     :no_auto_import],
    source: '/project/lib/x.ex'
  ],
  native: false,
  md5: <<195, 22, 254, 181, 205, 81, 155, 43, 204, 133, 244, 77, 11, 5, 183,
    73>>
]

How can one modify the source entry to something else than the name of the file where module X is defined?

I tried

defmodule X do
@compile {:source, "/project/lib/another_file.ex"}
def foo, do: IO.puts "foo"
end

but this has no effect.

Thanks