doc: Link to the "Scheme Crash Course".

* doc/guix.texi (Defining Packages): Add @quotation block linking to "A
Scheme Crash Course".
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Ludovic Courtès 2022-09-02 15:07:16 +02:00
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@ -7322,6 +7322,14 @@ unavailable to the build process, possibly leading to a build failure.
@xref{package Reference}, for a full description of possible fields.
@quotation Going further
@cindex Scheme programming language, getting started
Intimidated by the Scheme language or curious about it? The Cookbook
has a short section to get started that recaps some of the things shown
above and explains the fundamentals. @xref{A Scheme Crash Course,,,
guix-cookbook, GNU Guix Cookbook}, for more information.
@end quotation
Once a package definition is in place, the
package may actually be built using the @code{guix build} command-line
tool (@pxref{Invoking guix build}), troubleshooting any build failures