Ebuild 0.20.2 has a missing or malformed copyright/licensing header.
[Warning] Ebuild 0.20.2 uses a weak blocker (!) purely in DEPEND. Use strong blockers (!!) in DEPEND or weak blockers in RDEPEND: !dev-python/python-trezor
[Notice] Ebuild 0.20.2 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.
[Warning] Ebuild 0.20.2 uses spaces for indentation on line 9.
[Warning] Ebuild 0.20.2 uses spaces for indentation on line 10.
[Warning] Ebuild 0.20.2 uses spaces for indentation on line 11.
[Warning] Ebuild 0.20.2 uses spaces for indentation on line 12.
[Warning] Ebuild 0.20.2 uses spaces for indentation on line 13.
[Warning] Ebuild 0.20.2 uses spaces for indentation on line 14.
[Warning] Ebuild 0.20.2 uses spaces for indentation on line 15.
[Warning] Ebuild 0.20.2 uses spaces for indentation on line 16.
[Warning] Ebuild 0.20.2 uses spaces for indentation on line 17.
[Warning] Ebuild 0.20.2 uses spaces for indentation on line 18.
[Warning] Ebuild 0.20.2 uses spaces for indentation on line 19.
[Warning] Ebuild 0.20.2 uses spaces for indentation on line 20.
[Warning] Ebuild 0.20.2 uses spaces for indentation on line 21.
[Warning] Ebuild 0.20.2 uses spaces for indentation on line 22.
[Warning] Ebuild 0.20.2 uses spaces for indentation on line 23.
[Warning] Ebuild 0.20.2 uses spaces for indentation on line 24.
[Error] Manifest entry for unused DIST file 'trezor-0.20.2.tar.gz'
[Notice] Package has only unstable keywords for arch(es): [ amd64 ], all versions are unstable: [ 0.20.2 ]
[Error] Invalid or missing metadata.xml: open dev-python/trezor/metadata.xml: file does not exist