these 13 derivations will be built:
  /nix/store/6svki8r8xgvgvzcy9jhczs09rllvxxbw-unit-fast-nix-optimise.service.drv
  /nix/store/ylcmf861riwv4h2h9hka171air8xny00-unit-fast-nix-gc.service.drv
  /nix/store/rq81qsp87njn1m1kzz16jy8dsgmmg3b7-system-units.drv
  /nix/store/rvdi025s4xwj0x3m0sb1q1vb7x5g2s0v-etc.drv
  /nix/store/60sj3rqqp5wnw0rzhdqa0kw6ci0sgasf-activate.drv
  /nix/store/z8mm590ys0av5irnb7kqri19b0kmjiky-nixos-system-machine-test.drv
  /nix/store/dc7b5cv9sj7d2dgvkqsnjd8jrp1sic22-closure-info.drv
  /nix/store/pj7ll08z1sf7z4x9dqblk4gnsyr4qfxq-closure-info.drv
  /nix/store/19rmql2aykr18zin5276azbl0p48frjh-run-nixos-vm.drv
  /nix/store/ja92ssjz1rmshfhvkif1ki9sqxa3y4jf-nixos-vm.drv
  /nix/store/cpd6xj4b1gjyvx1k9ciamhvkmvpnc452-driverConfiguration.json.drv
  /nix/store/zcvzr3f8hg04mbr16bbwckdi7y2gz784-nixos-test-driver-fast-nix-gc.drv
  /nix/store/43jx86z33pa1pggbdl5wffpinpfm9va8-vm-test-run-fast-nix-gc.drv
building '/nix/store/ylcmf861riwv4h2h9hka171air8xny00-unit-fast-nix-gc.service.drv'
building '/nix/store/6svki8r8xgvgvzcy9jhczs09rllvxxbw-unit-fast-nix-optimise.service.drv'
unit-fast-nix-gc.service> tribuchet: building on jamie
unit-fast-nix-optimise.service> tribuchet: building on jamie
unit-fast-nix-gc.service> structuredAttrs is enabled
unit-fast-nix-optimise.service> structuredAttrs is enabled
building '/nix/store/rq81qsp87njn1m1kzz16jy8dsgmmg3b7-system-units.drv'
system-units> tribuchet: building on jamie
building '/nix/store/rvdi025s4xwj0x3m0sb1q1vb7x5g2s0v-etc.drv'
etc> tribuchet: building on jamie
building '/nix/store/60sj3rqqp5wnw0rzhdqa0kw6ci0sgasf-activate.drv'
activate> tribuchet: building on jamie
building '/nix/store/z8mm590ys0av5irnb7kqri19b0kmjiky-nixos-system-machine-test.drv'
nixos-system-machine-test> tribuchet: building on jamie