Ebuild 1.5.21 has a missing or malformed copyright/licensing header.
[Notice] Ebuild 1.5.21 has an invalid header. It should start with a valid copyright line (e.g., '# Copyright YEARS MAIN-CONTRIBUTOR') and the GPLv2 distribution text followed by an empty line.
[Notice] Package has only unstable keywords for arch(es): [ amd64 ], all versions are unstable: [ 1.5.21 ]
[Error] Invalid or missing metadata.xml: open dev-cpp/trantor/metadata.xml: file does not exist