these 2 derivations will be built:
  /nix/store/gp5hx10kr2k06xqxjgn5p0ca65856ml6-generate-dependency-diagram.drv
  /nix/store/ppvsyn3n6c4v2il7w4l220c5nn9sc90q-check-dependency-diagram.drv
building '/nix/store/gp5hx10kr2k06xqxjgn5p0ca65856ml6-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/gp5hx10kr2k06xqxjgn5p0ca65856ml6-generate-dependency-diagram.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/hp3cfcfd6f6amswckqd8b5fbr1x0if36-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/gp5hx10kr2k06xqxjgn5p0ca65856ml6-generate-dependency-diagram.drv
error: Cannot build '/nix/store/ppvsyn3n6c4v2il7w4l220c5nn9sc90q-check-dependency-diagram.drv'.
       Reason: 1 dependency failed.
       Output paths:
         /nix/store/i3mnfzl24hnij8f1pmn1awxq7xz9kabp-check-dependency-diagram