pup upgrade --channel canary does not work

[Hexagon]

After the migration to jsr.io (with dependencies moved from deps.ts into deno.json), installing the canary version of pup doesn't work:

➜  ~ pup upgrade --channel canary

Warning: Installing using Deno flag --unstable due to version requirements.

Running: deno install -qfr -A --unstable-kv -n pup https://raw.githubusercontent.com/Hexagon/pup/main/pup.ts
error: Relative import path "@cross/utils" not prefixed with / or ./ or ../
    at https://raw.githubusercontent.com/Hexagon/pup/main/lib/cli/main.ts:32:30

imports from deno.json doesn't seem to be handled when installing over https. -c does not seem to work over https either.