-o not working as expected

[Jason Addison]

I'm using 2.7.10.
If I'm in ~/mytunes/ and I type:
$ lilypond -o set1/tune1 set1/tune1.ly
I get the pdf file in ~/mytunes/ and the ps and midi files in ~/mytunes/set1/
I really want the pdf with the other output and source in ~/mytunes/set1/

A major reason I want this is because I'm trying to use scons to build
my tune set. scons _always_ calls the build command, whether is is
gcc, lilypond, latex, ..., from the top directory.

Thanks -Jason