This also moves us onto yarn, to be in line with the rest of our ecosystem.

success Set "yarn-offline-mirror" to "/nix/store/nmcpyykzzg7gdxyv3f2gfv9sbchsshcr-offline".
Done in 0.02s.
yarn install v1.22.19
[1/5] Validating package.json...
[2/5] Resolving packages...
error Couldn't find any versions for "chartjs-adapter-moment" that matches "1.0.1" in our cache (possible versions are ""). This is usually caused by a missing entry in the lockfile, running Yarn without the --offline flag may help fix this issue.