these 2 derivations will be built:
  /nix/store/vcxmzwp2rak1zl5s4i4mjs9nff9lby1a-generate-dependency-diagram.drv
  /nix/store/29xr4f38i42cm93cfd4ga4w2liwz49sn-check-dependency-diagram.drv
building '/nix/store/vcxmzwp2rak1zl5s4i4mjs9nff9lby1a-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/vcxmzwp2rak1zl5s4i4mjs9nff9lby1a-generate-dependency-diagram.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/sj5rn292gazajydxz71ib5pappvmp19i-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/vcxmzwp2rak1zl5s4i4mjs9nff9lby1a-generate-dependency-diagram.drv
error: Cannot build '/nix/store/29xr4f38i42cm93cfd4ga4w2liwz49sn-check-dependency-diagram.drv'.
       Reason: 1 dependency failed.
       Output paths:
         /nix/store/17jwk6523bk5nx92qb3ppd1fhck301i1-check-dependency-diagram