warning: unknown setting 'eval-cores'
warning: unknown setting 'lazy-trees'
this derivation will be built:
  /nix/store/6yk3v5x26kirhrd3bz335yyqry2vmrq4-formatting.drv
building '/nix/store/6yk3v5x26kirhrd3bz335yyqry2vmrq4-formatting.drv'