andrew@DownStairsComputer:~$ lilypond mgs_main_theme.mid 
GNU LilyPond 2.8.7
programming error: Cannot find file for FontConfig cache.
continuing, cross fingers
Processing `mgs_main_theme.mid'
Parsing...
/usr/share/lilypond/2.8.7/ly/init.ly:28:0: error: syntax error, unexpected SCM_T, expecting '='

#(if (and (ly:get-option 'old-relative)
mgs_main_theme.mid: 0: warning: no \version statement found,  add

\version "2.8.7"

for future compatibility
error: failed files: "mgs_main_theme.mid"