nixbot

failed to register gcroot /var/lib/nixbot/eval-gcroots/2070/inputs/27jjv4zwh0d1j4w2nwsf1p8hfripfhad-source -> /nix/store/27jjv4zwh0d1j4w2nwsf1p8hfripfhad-source: don't know how to build these paths:
  /nix/store/27jjv4zwh0d1j4w2nwsf1p8hfripfhad-source
error: path '/nix/store/27jjv4zwh0d1j4w2nwsf1p8hfripfhad-source' is required, but there is no substituter that can build it