this derivation will be built:
  /nix/store/ymdfwr3q3qkk3yxm0vqvd7wd1jaiic12-fail-2.drv
error: Cannot build '/nix/store/ymdfwr3q3qkk3yxm0vqvd7wd1jaiic12-fail-2.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/wc8y3g20cc34q9yrsmrbark0ba8i0aim-fail-2
       Last 2 log lines:
       > tribuchet: building on jamie
       > this build is supposed to fail
       For full logs, run:
         nix log /nix/store/ymdfwr3q3qkk3yxm0vqvd7wd1jaiic12-fail-2.drv