starting phase `build'
warning: `/tmp/guix-build-oniux-0.6.0.drv-0/source/.cargo/config` is deprecated in favor of `config.toml`
note: if you need to support cargo 1.38 or earlier, you can symlink `config` to `config.toml`
error: failed to get `onion-tunnel` as a dependency of package `oniux v0.6.0 (/tmp/guix-build-oniux-0.6.0.drv-0/source)`

Caused by:
  failed to load source for dependency `onion-tunnel`

Caused by:
  Unable to update https://gitlab.torproject.org/tpo/core/onionmasq.git

Caused by:
  can't checkout from 'https://gitlab.torproject.org/tpo/core/onionmasq.git': you are in the offline mode (--offline)
error: in phase 'build': uncaught exception:
%exception #<&invoke-error program: "cargo" arguments: ("build" "--offline" "-j" "8" "--release") exit-status: 101 term-signal: #f stop-signal: #f> 
phase `build' failed after 1.3 seconds
command "cargo" "build" "--offline" "-j" "8" "--release" failed with status 101
build process 10 exited with status 256