Ah, BSD pledge! This is so elegant, I never heard of it before. Once I used FreeBSD as the OS of my PC but uninstalled due to some lack of WiFi drivers reason, but I still remember the clean and tidy FreeBSD Handbook, quite nice.
"a la carte" is indeed nice, you could deliver your work in a thin and slim way, as for CFFI, I have to pack all those .so/.dylib/.dll with my game, which is kind of over "table d'hôte".