[Chicken-users] How to load an extension?

[Alejandro Forero Cuervo]

If an extension called, say, 'hello' has been installed, what's the
canonical way, with Chicken 4, to load it?

I'm confused with require-extension, require-library, require, import,
use and declare uses.  I'm looking for an answer that only has two
words, the second being "hello", and two parenthesis.  I would hate to
find out that one must use the words like "depends" to answer this
question.

Alejo.
http://azul.freaks-unidos.net/

Ps: I'm purposefully not specifying if 'hello' has macros, uses
'(module ...)', etc..

PPs: http://chicken.wiki.br/eggs%20tutorial seems confusing, it talks
about mpeg.import.scm without specifying that it's an autogenerated
file and it assumes that mpeg.scm uses "(module ...)", which may not
be the case.  I'd recommend fixing that or erasing that page
(replacing it with a link to the proper documentation that egg authors
should use).