VSLisp is an embedded Lisp library and standalone interpreter. It's very small, and runs on many platforms. It was developed as a graphics scripting language for VMS, but now its development goes under Unix, and old Graph library is not supported now. VSLisp is not Scheme or Common Lisp compatible. Surely, you can customize it to look like one of them, but by default VSLisp is a yet another Lisp dialect, and to work with it you'll need to understand the difference. VSLisp is distributed under the terms of the GNU General Public License version 2.
Binary packages can be installed with the high-level tool pkgin (which can be installed with pkg_add) or pkg_add(1) (installed by default). The NetBSD packages collection is also designed to permit easy installation from source.
The pkg_admin audit command locates any installed package which has been mentioned in security advisories as having vulnerabilities.
Please note the vulnerabilities database might not be fully accurate, and not every bug is exploitable with every configuration.
Problem reports, updates or suggestions for this package should be reported with send-pr.