this derivation will be built:
  /nix/store/qhyb8s1byacvis3v0hxhycdymn02wqdy-niks3-tests-1.4.0.drv
building '/nix/store/qhyb8s1byacvis3v0hxhycdymn02wqdy-niks3-tests-1.4.0.drv'
niks3-tests-1.4.0> tribuchet: hub connection lost (hub closed event stream without a result); reconnecting
niks3-tests-1.4.0> tribuchet: building on jamie
error: Cannot build '/nix/store/qhyb8s1byacvis3v0hxhycdymn02wqdy-niks3-tests-1.4.0.drv'.
       Reason: builder failed with exit code 3.
       Output paths:
         /nix/store/jnsin30dqlzqmny16a01p0k3kgy7rwcm-niks3-tests-1.4.0
       Last 2 log lines:
       > tribuchet: hub connection lost (hub closed event stream without a result); reconnecting
       > tribuchet: building on jamie
       For full logs, run:
         nix log /nix/store/qhyb8s1byacvis3v0hxhycdymn02wqdy-niks3-tests-1.4.0.drv