this derivation will be built:
  /nix/store/72v8fn63x9vn2dzsri9symlrq6nfi7c6-tribuchet-darwin-module.drv
building '/nix/store/72v8fn63x9vn2dzsri9symlrq6nfi7c6-tribuchet-darwin-module.drv'
tribuchet-darwin-module> tribuchet: building on jamie