Use to have Export to Lylipond in a menu or something like that. But I do prefer it without anchovies.
In the old days, before the pizza, I use to export others formats to midi or MusicXML or PS and then to Lylipond with diferent small free software without having to do that thing of the 'phrygian mode'.
The apropos output gives:
# apropos 2ly
abc2ly (1) - manual page for abc2ly (LilyPond) 2.16.0
etf2ly (1) - manual page for etf2ly (LilyPond) 2.16.0
midi2ly (1) - manual page for midi2ly (LilyPond) 2.16.0
musicxml2ly (1) - manual page for musicxml2ly (LilyPond) 2.16.0
You can start from there...
Luck!