this derivation will be built:
  /nix/store/x14gdq7y54ixzx9dw41yp0g29n76yk7y-fail-1.drv
error: Cannot build '/nix/store/x14gdq7y54ixzx9dw41yp0g29n76yk7y-fail-1.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/lygr2azi9cqhi81dlnbvsmd3sjnkrzp4-fail-1
       Last 2 log lines:
       > tribuchet: building on jamie
       > this build is supposed to fail
       For full logs, run:
         nix log /nix/store/x14gdq7y54ixzx9dw41yp0g29n76yk7y-fail-1.drv