this derivation will be built:
  /nix/store/ka47fqq358nsrvxxxnibmwqsc2ffslns-fail-5.drv
waiting for the big Nix store lock...
building '/nix/store/ka47fqq358nsrvxxxnibmwqsc2ffslns-fail-5.drv' on 'ssh-ng://nix@eliza'
building '/nix/store/ka47fqq358nsrvxxxnibmwqsc2ffslns-fail-5.drv'
fail-5> this build is supposed to fail
error: build of '/nix/store/ka47fqq358nsrvxxxnibmwqsc2ffslns-fail-5.drv' on 'ssh-ng://nix@eliza' failed: Cannot build '/nix/store/ka47fqq358nsrvxxxnibmwqsc2ffslns-fail-5.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/hzzrpv66sqq7adz5rrzj61km1crh14r1-fail-5
       Last 1 log lines:
       > this build is supposed to fail
       For full logs, run:
         nix log /nix/store/ka47fqq358nsrvxxxnibmwqsc2ffslns-fail-5.drv
error: Cannot build '/nix/store/ka47fqq358nsrvxxxnibmwqsc2ffslns-fail-5.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/hzzrpv66sqq7adz5rrzj61km1crh14r1-fail-5