these 6 derivations will be built:
  /nix/store/fxxvc393f2xpqbkpw53hky25qb40pkdi-tribuchet-worker-customisation-layer.drv
  /nix/store/17hjd24699cvjcp5480vljpi3rgzlrsb-excludePaths.drv
  /nix/store/i94vw6a5j1w8hms72mv81a9ml881791r-layers.json.drv
  /nix/store/yjk8vw3w9qda29npaj7k1qhsyk4fn1cb-tribuchet-worker-conf.json.drv
  /nix/store/imhjlx4yirck2lsic8rc3igqkb5zmwm5-stream-tribuchet-worker.drv
  /nix/store/bmcpq3rbn1k7y67w3d3jrsgi659mjmws-tribuchet-worker.tar.gz.drv
building '/nix/store/fxxvc393f2xpqbkpw53hky25qb40pkdi-tribuchet-worker-customisation-layer.drv'
tribuchet-worker-customisation-layer> tribuchet: building on jamie
building '/nix/store/17hjd24699cvjcp5480vljpi3rgzlrsb-excludePaths.drv'
excludePaths> tribuchet: building on jamie