In this reST example meant to be rendered by Sphinx, |yaco_url| doesn't get replaced because it's in a code-block:
.. |yaco_url| replace:: http://yaco.es/
You can use wget to download it:
.. code-block:: console
$ wget |yaco_url|package.tar.gz
I wonder if there is some way to force the replacement of |yaco_url| before rendering the code block.
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