these 3 derivations will be built:
  /nix/store/rz44li5ghnvvkzk9dv63x2ijssbpxiw3-pythoncheck.sh.drv
  /nix/store/wgj3wm03li8xr72yjn4zfbjlr4jmy8lh-nixbot-pr-comment.drv
  /nix/store/12zvdnfmqrf0214z6y8x57c2s4h7ywpz-inputDerivation-needs-label.drv
building '/nix/store/12zvdnfmqrf0214z6y8x57c2s4h7ywpz-inputDerivation-needs-label.drv'...