substitute: updating list of substitutes from 'https://mirror.hydra.gnu.org'... substitute: updating list of substitutes from 'https://mirror.hydra.gnu.org'... 100.0% substitute: updating list of substitutes from 'https://mirror.hydra.gnu.org'... substitute: updating list of substitutes from 'https://mirror.hydra.gnu.org'... 100.0% substitute: updating list of substitutes from 'https://mirror.hydra.gnu.org'... substitute: updating list of substitutes from 'https://mirror.hydra.gnu.org'... substitute: updating list of substitutes from 'https://mirror.hydra.gnu.org'... 100.0% substitute: updating list of substitutes from 'https://mirror.hydra.gnu.org'... substitute: updating list of substitutes from 'https://mirror.hydra.gnu.org'... 100.0% substitute: updating list of substitutes from 'https://mirror.hydra.gnu.org'... 0.0%Backtrace: substitute: In ice-9/boot-9.scm: substitute: 160: 9 [catch #t #<catch-closure 84e45e0> ...] substitute: In unknown file: substitute: ?: 8 [apply-smob/1 #<catch-closure 84e45e0>] substitute: In ice-9/boot-9.scm: substitute: 66: 7 [call-with-prompt prompt0 ...] substitute: In ice-9/eval.scm: substitute: 432: 6 [eval # #] substitute: In ice-9/boot-9.scm: substitute: 2404: 5 [save-module-excursion #<procedure 84f6c80 at ice-9/boot-9.scm:4051:3 ()>] substitute: 4056: 4 [#<procedure 84f6c80 at ice-9/boot-9.scm:4051:3 ()>] substitute: 1727: 3 [%start-stack load-stack ...] substitute: 1732: 2 [#<procedure 84fd570 ()>] substitute: In unknown file: substitute: ?: 1 [primitive-load "/gnu/store/c77gfhkmnwjvgmnsafjxf1g9kkpiilbh-guix-0.12.0-4.d9da/bin/.guix-real"] substitute: In guix/ui.scm: substitute: 1228: 0 [run-guix-command substitute "--query"] substitute: substitute: guix/ui.scm:1228:8: In procedure run-guix-command: substitute: guix/ui.scm:1228:8: Bad Read-Header-Line header: #<eof> substitute: guix system: error: build failed: substituter `substitute' died unexpectedly
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