nixbot

failed to register gcroot /var/lib/nixbot/eval-gcroots/597/inputs/ncjd1i3axlg5r4x66h76c4y4a202ma9h-source -> /nix/store/ncjd1i3axlg5r4x66h76c4y4a202ma9h-source: warning: unknown setting 'eval-cores'
warning: unknown setting 'lazy-trees'
don't know how to build these paths:
  /nix/store/ncjd1i3axlg5r4x66h76c4y4a202ma9h-source
error: path '/nix/store/ncjd1i3axlg5r4x66h76c4y4a202ma9h-source' is required, but there is no substituter that can build it