Get the full CDROM with installer on Sourceforge: https://sourceforge.net/projects/freebsd-12-r328126/
CDROM ISO: https://sourceforge.net/projects/freebsd-12-r328126/
boot directory copy from the cdrom of working entropy on modern notebook, i.e. FreeBSD 12.0-current freebsd 12.0-current #0 r328126 thu jan 18 18:13:19 utc 2018 boot@relengen3.nyi.freebsd.org /usr/obj/usr/src/i386.i386/sys/eneric i386
The best fix is to use : pkg static
You're supposed to run pkg-static install -f pkg as pkg output suggests.