substitute: substitute: updating list of substitutes from 'https://mirror.hydra.gnu.org'... 0.0% substitute: updating list of substitutes from 'https://mirror.hydra.gnu.org'... 100.0% building path(s) `/gnu/store/9p89jwaf4hnm0w5chfswcmfcf0v18719-artanis-0.2.1.tar.gz' | executing builder `builtin:download' Starting download of /gnu/store/9p89jwaf4hnm0w5chfswcmfcf0v18719-artanis-0.2.1.tar.gz From ftp://alpha.gnu.org/gnu/artanis/artanis-0.2.1.tar.gz... ERROR: Throw to key `ftp-error' with args `(# "RETR artanis-0.2.1.tar.gz" 550 "Failed to open file.\r")'. Starting download of /gnu/store/9p89jwaf4hnm0w5chfswcmfcf0v18719-artanis-0.2.1.tar.gz From http://mirror.hydra.gnu.org/file/artanis-0.2.1.tar.gz/sha256/041ajcg2pz918kd9iqcj4inpzddc3impvz3r2nhlpbv8zrz011hn... ERROR: download failed "http://mirror.hydra.gnu.org/file/artanis-0.2.1.tar.gz/sha256/041ajcg2pz918kd9iqcj4inpzddc3impvz3r2nhlpbv8zrz011hn" 404 "Not Found" Starting download of /gnu/store/9p89jwaf4hnm0w5chfswcmfcf0v18719-artanis-0.2.1.tar.gz From http://tarballs.nixos.org/sha256/041ajcg2pz918kd9iqcj4inpzddc3impvz3r2nhlpbv8zrz011hn... ERROR: download failed "http://tarballs.nixos.org/sha256/041ajcg2pz918kd9iqcj4inpzddc3impvz3r2nhlpbv8zrz011hn" 404 "Not Found" failed to download "/gnu/store/9p89jwaf4hnm0w5chfswcmfcf0v18719-artanis-0.2.1.tar.gz" from "ftp://alpha.gnu.org/gnu/artanis/artanis-0.2.1.tar.gz" builder for `/gnu/store/y71m1hyqy83wr6nligda5n45gaqi03ql-artanis-0.2.1.tar.gz.drv' failed to produce output path `/gnu/store/9p89jwaf4hnm0w5chfswcmfcf0v18719-artanis-0.2.1.tar.gz' cannot build derivation `/gnu/store/zvikipw5yx8m5kylhpwf09sf7lxwnzaj-artanis-0.2.1.drv': 1 dependencies couldn't be built guix package: error: build failed: build of `/gnu/store/zvikipw5yx8m5kylhpwf09sf7lxwnzaj-artanis-0.2.1.drv' failed