For compiling and running LilyPond see the installation instructions.
These instructions can be found when you unpack lilypond, as
-@file{lilypond-x.y.z/INSTALL.txt}. They are also available on the web
+@file{lilypond-x.y.z/INSTALL.txt}. They are also available on the web
at
@uref{http://lilypond.org/doc/v2.12/Documentation/topdocs/INSTALL.html}.