Ebuild 2021.12 has a missing or malformed copyright/licensing header.
[Error] Ebuild 2021.12 uses an obsolete EAPI '0'. EAPIs 0 to 4 are obsolete and must no longer be used.
[Notice] Ebuild 2021.12 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.
[Error] Ebuild 9999 KEYWORDS is defined multiple times. It must be defined at most once.
[Error] Ebuild 2021.12 does not specify LICENSE
[Warning] Ebuild 2021.12 is missing DESCRIPTION
[Warning] Ebuild 2021.12 is missing HOMEPAGE
[Warning] Ebuild 2021.12 has empty KEYWORDS
[Warning] Ebuild 2021.12 is missing the SLOT variable.
[Error] Repository is missing a repo-name in metadata/layout.conf or profiles/repo_name