If we download https://github.com/docker/docker-ce/archive/v17.12.0-ce.tar.gz , it's size is 11008332. And the git tag "v17.12.0-ce" of docker-ce points to commit "c97c6d62c26c1da407e3086f0b5d3d866ed308bc". (As seen at https://github.com/docker/docker-ce/releases/tag/v17.12.0-ce .) However, the Manifest file says the docker 17.12.0's tarball file size is 11011208 , which looks wrong. This must be 11008332. And I gueess the corresponding SHA512 should be fixed as well. (https://gitweb.gentoo.org/repo/gentoo.git/tree/app-emulation/docker/Manifest#n3 ) Also, docker-17.12.0.ebuild has "DOCKER_GITCOMMIT=486a48d", which seems also wrong. This must be "c97c6d6". (https://gitweb.gentoo.org/repo/gentoo.git/tree/app-emulation/docker/docker-17.12.0.ebuild#n20 ) A few days ago, I believe docker-ce's tag "v17.12.0-ce" used to point to the commit "486a48d", which is actually not in 17.12 branch but in 18.01 branch. I guess Docker maintainers tagged a wrong commit by mistake. Now the tag "v17.12.0-ce" correctly points to "c97c6d6". I guess they fixed it very recently. Hence, the file https://github.com/docker/docker-ce/archive/v17.12.0-ce.tar.gz is different from what it used to be a few days ago. If it was fetched to any mirror, the mirror should be updated as well.
Apparently, they retagged it without telling anyone. https://github.com/docker/docker-ce/commit/c97c6d62c26c1da407e3086f0b5d3d866ed308bc#commitcomment-26664506 Thanks for the report! Fixed in b6126df88dc1957534ea6e0234cc76d24fcae5a8
