nixbot

failed to register gcroot /var/lib/nixbot/eval-gcroots/394/inputs/xi6jgf2hc1a80bhqrnjcfcx59qdjly2s-source -> /nix/store/xi6jgf2hc1a80bhqrnjcfcx59qdjly2s-source: don't know how to build these paths:
  /nix/store/xi6jgf2hc1a80bhqrnjcfcx59qdjly2s-source
error: path '/nix/store/xi6jgf2hc1a80bhqrnjcfcx59qdjly2s-source' is required, but there is no substituter that can build it