Guix pull just failed for me with the following output: -- $ guix pull Updating channel 'guix' from Git repository at ' https://git.savannah.gnu.org/git/guix.git'... Authenticating channel 'guix', commits 9edb3f6 to eb0dd06 (15 846 new commits)... Building from this channel: guix https://git.savannah.gnu.org/git/guix.git eb0dd06 substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0% substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0% substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0% building /gnu/store/sflmgcfcdwizj7iyd3pfksdvrkc3pskb-config.scm.drv... building /gnu/store/7k17dvmcrdicjsdxmpvhss4p3i3d70j5-git.scm.drv... building /gnu/store/j9s3n7iqvh8pqkxkwy91nq3qynr1nby7-hash.scm.drv... building /gnu/store/bkfw21qsrqmpnzb5hvwncgvcj72fgraq-module-import.drv... building /gnu/store/qzn1sr1v9k6mayfqa465y795ld5wp4l1-module-import.drv... building /gnu/store/d25byc0acqcy2rr7g2m7n56hqkf25ynn-module-import-compiled.drv... building /gnu/store/7naf4a8g0gn86d0ppwmsg8h363laqfbc-module-import-compiled.drv... building /gnu/store/rw2h0mr4wgl7d5hw46snzz73azzrvqpn-compute-guix-derivation.drv... substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0% substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0% substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0% substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0% substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0% substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0% substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0% substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0% substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0% substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0% substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0% substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0% substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0% substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0% substitute: updating substitutes from 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[##################] 100.0% graphviz-2.49.0 1.3MiB 166KiB/s 00:08 [##################] 100.0% substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0% -Backtrace: 15 (primitive-load "/gnu/store/zg6y79sg5y7hwnd3cf3y25sw5q1yv0hm-compute-guix-derivation") In ice-9/eval.scm: 155:9 14 (_ _) 159:9 13 (_ #(#(#(#(#(#(#(#(#(#(#(#(#(#(#(#(# ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?)) In ice-9/boot-9.scm: 152:2 12 (with-fluid* _ _ _) 152:2 11 (with-fluid* _ _ _) In ./guix/store.scm: 2123:24 10 (run-with-store # _ #:guile-for-build _ #:system _ #:target _) 1960:8 9 (_ _) In ./guix/gexp.scm: 296:22 8 (_ _) 1180:2 7 (_ _) 1046:2 6 (_ _) 892:4 5 (_ _) In ./guix/store.scm: 2008:12 4 (_ #) 1410:13 3 (map/accumulate-builds # # ?) 1410:13 2 (map/accumulate-builds # # ?) 1406:5 1 (map/accumulate-builds # # ?) 1421:15 0 (_ # _ _) ./guix/store.scm:1421:15: ERROR: 1. &store-protocol-error: message: "some substitutes for the outputs of derivation `/gnu/store/qspjzcv5clnx8wasifdi6gmk9ijrn1cc-po4a-0.63.drv' failed (usually happens due to networking issues); try `--fallback' to build derivation from source " status: 1 guix pull: error: You found a bug: the program '/gnu/store/zg6y79sg5y7hwnd3cf3y25sw5q1yv0hm-compute-guix-derivation' failed to compute the derivation for Guix (version: "eb0dd063a0687301b6d805feaf4b1ada87f6e120"; system: "x86_64-linux"; host version: "1.3.0"; pull-version: 1).