"not a valid repository name" error

[rnhmjoj]

I'm getting this error while generating a package

fatal: remote error:
github:matrix-org/react-gemini-scrollbar is not a valid repository name

The problem appears to be related to the github URL scheme. https://github.com/ssbc/patchwork/issues/458 mentions old npm versions as a cause but I have version 3.10 which should support it.