jansson : C library for encoding, decoding and manipulating JSON data ( https://www.digip.org/jansson/ )
libf2c : Library that converts FORTRAN to C source ( http://www.netlib.org/f2c/ )
nng : High-performance messaging interface for distributed applications ( https://nng.nanomsg.org/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a phackerlay
For Paludis use this rsync : rsync://gentoo.zugaina.org/phackerlay-portage
If you have a problem : ycarus(-at-)zugaina.org