nixbot

failed to register gcroot /var/lib/nixbot/eval-gcroots/788/inputs/0yw2b29pg31ygcwdnmphpmy7i9xmcp5f-source -> /nix/store/0yw2b29pg31ygcwdnmphpmy7i9xmcp5f-source: don't know how to build these paths:
  /nix/store/0yw2b29pg31ygcwdnmphpmy7i9xmcp5f-source
error: path '/nix/store/0yw2b29pg31ygcwdnmphpmy7i9xmcp5f-source' is required, but there is no substituter that can build it