~/src/chicken-eggs/release/4$ find -name \*.meta -exec grep -i gpl {} \;|sort -u
(files "hen.scm" "README.org" "gpl-3.0.txt" "hen.meta" "doc/protocol.txt" "hen.setup" "hen.utils.scm" "tests/run.scm"))
 (files "zlib.meta" "zlib.setup" "README.org" "gpl-3.0.txt" "zlib.scm" "tests/run.scm"))
 (license "GPL")
 (license "GPL-2")
 (license "GPL-3")
((license "GPL-3")
 (license "LGPL")
 (license "LGPL-1")
 (license "LGPL-2")
 (license "LGPL-2.1")
 (license "LGPL 3")
 (license "LGPL-3")
c