these 3 derivations will be built:
  /nix/store/craq28dk3hsphk7pv7m35ai8wal7bz61-notmuch-0.40.drv
  /nix/store/pvqpximmr9b4k25whfwgpdhrg6izcqhj-msmtp-1.8.32.drv
  /nix/store/n7wj0cigk0pcrx8rd13461ad35jzwy67-msmtp.drv
building '/nix/store/pvqpximmr9b4k25whfwgpdhrg6izcqhj-msmtp-1.8.32.drv'
msmtp-1.8.32> tribuchet: building on jamie
msmtp-1.8.32> tribuchet worker error: peer error: com.tribuchet.Agent.Busy
error: Cannot build '/nix/store/pvqpximmr9b4k25whfwgpdhrg6izcqhj-msmtp-1.8.32.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/l8cfhddyk0y37fp3hkrvd71b1li56jn2-msmtp-1.8.32
       Last 2 log lines:
       > tribuchet: building on jamie
       > tribuchet worker error: peer error: com.tribuchet.Agent.Busy
       For full logs, run:
         nix log /nix/store/pvqpximmr9b4k25whfwgpdhrg6izcqhj-msmtp-1.8.32.drv
error: Cannot build '/nix/store/n7wj0cigk0pcrx8rd13461ad35jzwy67-msmtp.drv'.
       Reason: 1 dependency failed.
       Output paths:
         /nix/store/fna85ad7bl5yhv501028m266bimgzkma-msmtp