Hi, David McInnis skribis: > substitute: guix/ui.scm:1209:6: In procedure run-guix-command: > substitute: guix/ui.scm:1209:6: unmatched line "" > actual-value: #f > actual-error: > + (srfi-34 > + #) > result: FAIL I think your ISP does DNS hijacking: it resolves the “does-not-exist” hostname used in this test and other tests to an IP. The tests expect an name lookup error, and instead get this, hence the error. I think there’s not much we can do on your side, but you should definitely complain to your ISP. :-) Thanks, Ludo’.