-djob-count not working?

[Federico Bruni]

Hi folks

I would expect -djob-count=2 to launch 2 processes which I should see 
in my system monitor, but I see only one lilypond instance. I'm missing 
something or what?

I have a 2 core CPU (and 4 threads).

By the way, when I build a project of mine which uses Meson/Ninja, I 
see 4 lilypond processes active at the same time. This happens because 
Meson automatically detects the number of CPU and parallelize itself 
accordingly:
https://mesonbuild.com/Running-Meson.html#building-the-source