this derivation will be built:
  /nix/store/fh5rqvzsg4np2wbnad6xkmspa9jg5wk4-treefmt-check.drv
fh5rqvzsg4np2wbnad6xkmspa9jg5wk4-treefmt-check.drv: mac02: not scheduled here: fh5rqvzsg4np2wbnad6xkmspa9jg5wk4-treefmt-check.drv, asking the scheduler again