this derivation will be built:
  /nix/store/3xzfh5hl7q15zg68ffz05f5lwajki6x0-fail-4.drv
waiting for the big Nix store lock...
building '/nix/store/3xzfh5hl7q15zg68ffz05f5lwajki6x0-fail-4.drv' on 'ssh-ng://nix@jamie'
building '/nix/store/3xzfh5hl7q15zg68ffz05f5lwajki6x0-fail-4.drv'
fail-4> this build is supposed to fail
error: build of '/nix/store/3xzfh5hl7q15zg68ffz05f5lwajki6x0-fail-4.drv' on 'ssh-ng://nix@jamie' failed: Cannot build '/nix/store/3xzfh5hl7q15zg68ffz05f5lwajki6x0-fail-4.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/2k5pna1xbs0gwn9mcnkqy327av5cwpsw-fail-4
       Last 1 log lines:
       > this build is supposed to fail
       For full logs, run:
         nix log /nix/store/3xzfh5hl7q15zg68ffz05f5lwajki6x0-fail-4.drv
error: Cannot build '/nix/store/3xzfh5hl7q15zg68ffz05f5lwajki6x0-fail-4.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/2k5pna1xbs0gwn9mcnkqy327av5cwpsw-fail-4