<para>
Allows you to extend a recipe so that it builds variants of the software.
Common variants for recipes exist such as "natives" like <filename>quilt-native</filename>,
- which is a copy of quilt built to run on the build system;
+ which is a copy of Quilt built to run on the build system;
"crosses" such as <filename>gcc-cross</filename>,
which is a compiler built to run on the build machine but produces binaries
that run on the target <link linkend='var-MACHINE'><filename>MACHINE</filename></link>;