@okyeron , no , probably because my nornsPI image is very close to norns,
so what I do is use the update.tgz, unpack it, and adapt it to my setup - this only takes a few minutes. so its likely the update had jackd2-dev installed. (this was the case with boost on my nornsPI)
the other possibility, is I also have Orac (inc PD) / MEC (my software) and EigenD, running on my Norns PI - so Ive likely installed it as part of that.
(but I don’t use boost for other software, hence why I noticed it needed to be installed on other platforms)
@reijo, good question … its the latest Raspbian kernel, (not the norns kernel build)
I cannot remember if i kept with my own build of it, or reverted it back to stock.
I did play with quite a lot of kernels, including RT pre-empts, but they didn’t provide much better performance when I did tests with norns, so possibly i reverted, but i might not 
Then I upgraded to a rPI3B+ when it was released, and thats has a bit of ‘headroom’ over the CM3 of the Norn, so performance was never an issue.
I guess now some are starting to upgrade their Norns to CM3+, which is same cpu as rPI3B+, we may start to see some scripts that push it a little more
…
on the flip side 2.0 should offer a little better load distribution over cores, so should be less of an issue.