For a full reference to bpftrace, see the Man page Contributed by Brendan Gregg, Netflix (2018), based on his FreeBSD DTrace Tutorial. bpftrace -l 'tracepoint:syscalls:sys_enter_*' "bpftrace -l" lists ...
pkg is built on top of libpkg, a new library to interface with the package registration backends. It abstracts package management details such as registration, remote repositories, package creation, ...