these 2 derivations will be built:
  /nix/store/vz7rldp4bavpfrpfnv58v8ni33yqfrn9-generate-dependency-diagram.drv
  /nix/store/sv40ihkkan322wbwfl374y4in39gsf0h-check-dependency-diagram.drv
building '/nix/store/vz7rldp4bavpfrpfnv58v8ni33yqfrn9-generate-dependency-diagram.drv'
generate-dependency-diagram> tribuchet: building on jamie
generate-dependency-diagram> Store crate(s) not categorized: store-gc. Add to STORE_PURE or STORE_IMPURE in /nix/store/i36v84nbskp43x17qcnkjavis3pdsx52-dependency-diagram.py.
error: Cannot build '/nix/store/vz7rldp4bavpfrpfnv58v8ni33yqfrn9-generate-dependency-diagram.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/pxgq9gjzp8alzby2ir9kz12rjzpr27my-generate-dependency-diagram
       Last 2 log lines:
       > tribuchet: building on jamie
       > Store crate(s) not categorized: store-gc. Add to STORE_PURE or STORE_IMPURE in /nix/store/i36v84nbskp43x17qcnkjavis3pdsx52-dependency-diagram.py.
       For full logs, run:
         nix log /nix/store/vz7rldp4bavpfrpfnv58v8ni33yqfrn9-generate-dependency-diagram.drv
error: Cannot build '/nix/store/sv40ihkkan322wbwfl374y4in39gsf0h-check-dependency-diagram.drv'.
       Reason: 1 dependency failed.
       Output paths:
         /nix/store/s41hf4bcibfw3ig5wldgrd2bcd4c62f8-check-dependency-diagram