this derivation will be built:
  /nix/store/fw9plkk4vs04a7iiclvwgbvk2rv3ps4q-fail-3.drv
error: Cannot build '/nix/store/fw9plkk4vs04a7iiclvwgbvk2rv3ps4q-fail-3.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/n5klnj1lm3v4qhj9iykii49qkgvssbq3-fail-3
       Last 2 log lines:
       > tribuchet: building on jamie
       > this build is supposed to fail
       For full logs, run:
         nix log /nix/store/fw9plkk4vs04a7iiclvwgbvk2rv3ps4q-fail-3.drv