$ guix pull [...] graphviz-2.49.0 1.3MiB 143.9MiB/s 00:00 [##################] 100.0% subversion-1.14.1 2.6MiB 2.98GiB/s 00:00 [##################] 100.0% ruby-2.7.7 5.4MiB 2.7MiB/s 00:02 [############## ] 82.2%Backtrace: 19 (primitive-load "/gnu/store/g7amcjqbdiqk58kcqmxw455x2b8mjywn-compute-guix-derivation") In ice-9/eval.scm: 155:9 18 (_ _) 159:9 17 (_ #(#(#(#(#(#(#(#(#(#(#(#(#(#(#(#(# ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?)) In ice-9/boot-9.scm: 152:2 16 (with-fluid* _ _ _) 152:2 15 (with-fluid* _ _ _) In ./guix/store.scm: 2170:24 14 (run-with-store # # ?) 1998:8 13 (_ #) In ./guix/gexp.scm: 299:22 12 (_ #) 1180:2 11 (_ #) 1046:2 10 (_ #) 892:4 9 (_ #) In ./guix/store.scm: 2055:12 8 (_ #) 1407:13 7 (map/accumulate-builds # # ?) 1407:13 6 (map/accumulate-builds # # ?) 1407:13 5 (map/accumulate-builds # # ?) 1407:13 4 (map/accumulate-builds # # ?) 1407:13 3 (map/accumulate-builds # # ?) 1403:5 2 (map/accumulate-builds # # ?) 1419:15 1 (_ # ("/gnu/store/nqs6ww2cqgwnvncx81j5pwmp0y31255a-ruby-2.7.7.d?") ?) 1419:15 0 (loop #f) ./guix/store.scm:1419:15: In procedure loop: ERROR: 1. &store-protocol-error: message: "some substitutes for the outputs of derivation `/gnu/store/nqs6ww2cqgwnvncx81j5pwmp0y31255a-ruby-2.7.7.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/g7amcjqbdiqk58kcqmxw455x2b8mjywn-compute-guix-derivation' failed to compute the derivation for Guix (version: "f5446f721121c50a6e8fdf1e7285d861dfd180b8"; system: "x86_64-linux"; host version: "UNKNOWN"; pull-version: 1). Please report the COMPLETE output above by email to .