these 6 derivations will be built:
  /nix/store/j8aw6apmc2g6xx7lpmddmc5zp65qfsjr-tribuchet-worker-customisation-layer.drv
  /nix/store/h2rakrykc5g0a6ms6yd3i7wik73a44ac-excludePaths.drv
  /nix/store/05a8bff5hkb9vx1c2n921dwlwmmr3i58-layers.json.drv
  /nix/store/6qjly63sdg2rvjm0v5zshf79pyn8hpix-tribuchet-worker-conf.json.drv
  /nix/store/l49l6n308w5lzddrk02l2fqkc5gdc50l-stream-tribuchet-worker.drv
  /nix/store/3x5l0ccyiv5gxx4qydqpzi156swdlc00-tribuchet-worker.tar.gz.drv
building '/nix/store/j8aw6apmc2g6xx7lpmddmc5zp65qfsjr-tribuchet-worker-customisation-layer.drv'
tribuchet-worker-customisation-layer> tribuchet: building on jamie
building '/nix/store/h2rakrykc5g0a6ms6yd3i7wik73a44ac-excludePaths.drv'
excludePaths> tribuchet: building on jamie
building '/nix/store/05a8bff5hkb9vx1c2n921dwlwmmr3i58-layers.json.drv'
layers.json> tribuchet: building on jamie