osr:[root]:/# pacman -Sy base-devel tar gzip
error: GPGME error: No data
error: GPGME error: No data
:: Synchronising package databases...
system.db failed to download
error: failed retrieving file 'system.db' from archlinux.uk.mirror.allworldit.com : The requested URL returned error: 404
error: failed retrieving file 'system.db' from mirror.bytemark.co.uk : The requested URL returned error: 404
error: failed retrieving file 'system.db' from london.mirror.pkgbuild.com : The requested URL returned error: 404
error: failed retrieving file 'system.db' from mirrors.gethosted.online : Could not resolve host: mirrors.gethosted.online
warning: too many errors from mirrors.gethosted.online, skipping for the remainder of this transaction
error: failed retrieving file 'system.db' from mirrors.melbourne.co.uk : The requested URL returned error: 404
error: failed retrieving file 'system.db' from mirror.infernocomms.net : The requested URL returned error: 404
error: failed retrieving file 'system.db' from www.mirrorservice.org : The requested URL returned error: 404
error: failed retrieving file 'system.db' from mirror.netweaver.uk : The requested URL returned error: 404
error: failed retrieving file 'system.db' from lon.mirror.rackspace.com : The requested URL returned error: 404
error: failed retrieving file 'system.db' from repo.slithery.uk : The requested URL returned error: 404
error: failed retrieving file 'system.db' from mirrors.ukfast.co.uk : The requested URL returned error: 404
error: failed retrieving file 'system.db' from mirror.cov.ukservers.com : The requested URL returned error: 404
error: failed retrieving file 'system.db' from mirror.vinehost.net : The requested URL returned error: 404
error: failed to synchronize all databases (failed to retrieve some files)
There are similar topics on the forum, look for them.
Maybe :
https://artixlinux.org/news.php#Server_malfunction