FreeBSD's Makefile for log4shib shows APACHE20, but the project appears to be LGPL licensed. https://cgit.freebsd.org/ports/tree/devel/log4shib/Makefile Looking at the project it contains a COPYING file that shows a GPL license Showing just the contents of a head of the file: GNU LESSER GENERAL PUBLIC LICENSE Version 2.1, February 1999 Copyright (C) 1991, 1999 Free Software Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. [This is the first released version of the Lesser GPL. It also counts as the successor of the GNU Library Public License, version 2, hence Looking through the project's ChangeLog file it contains the following change message: 2001-02-15 Bastiaan Bakker <bastiaan.bakker@lifeline.nl> Release 0.2.1 Changed license to the GNU Lesser General Public License (LGPL). I also noticed that homebrew shows the project as LGPL as well: https://github.com/Homebrew/homebrew-core/blob/master/Formula/log4shib.rb#L6