this derivation will be built:
  /nix/store/n14nlyzdnfqldvga8zg4qva6q31dbzap-nixpkgs-review.drv
building '/nix/store/n14nlyzdnfqldvga8zg4qva6q31dbzap-nixpkgs-review.drv'
nixpkgs-review> tribuchet: building on mac02
nixpkgs-review> tribuchet worker error: connecting to the local nix-daemon: serverMagic: io error unexpected end-of-file: unexpected end-of-file
error: Cannot build '/nix/store/n14nlyzdnfqldvga8zg4qva6q31dbzap-nixpkgs-review.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/04wg8wpghjw90w8n3s8v4bl65q4khc68-nixpkgs-review-dist
         /nix/store/4m9m7jr01aaci1g34kj13w28cqbm61yc-nixpkgs-review
       Last 2 log lines:
       > tribuchet: building on mac02
       > tribuchet worker error: connecting to the local nix-daemon: serverMagic: io error unexpected end-of-file: unexpected end-of-file
       For full logs, run:
         nix log /nix/store/n14nlyzdnfqldvga8zg4qva6q31dbzap-nixpkgs-review.drv


nixbot: transient error detected, retrying once

this derivation will be built:
  /nix/store/n14nlyzdnfqldvga8zg4qva6q31dbzap-nixpkgs-review.drv
building '/nix/store/n14nlyzdnfqldvga8zg4qva6q31dbzap-nixpkgs-review.drv'
nixpkgs-review> tribuchet: building on mac02
nixpkgs-review> tribuchet worker error: connecting to the local nix-daemon: serverMagic: io error unexpected end-of-file: unexpected end-of-file
error: Cannot build '/nix/store/n14nlyzdnfqldvga8zg4qva6q31dbzap-nixpkgs-review.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/04wg8wpghjw90w8n3s8v4bl65q4khc68-nixpkgs-review-dist
         /nix/store/4m9m7jr01aaci1g34kj13w28cqbm61yc-nixpkgs-review
       Last 2 log lines:
       > tribuchet: building on mac02
       > tribuchet worker error: connecting to the local nix-daemon: serverMagic: io error unexpected end-of-file: unexpected end-of-file
       For full logs, run:
         nix log /nix/store/n14nlyzdnfqldvga8zg4qva6q31dbzap-nixpkgs-review.drv