github:yarnpkg/berry/@yarnpkg/cli/4.0.0-rc.41', '@yarnpkg/cli/4.0.0-rc.41' is not a branch/tag name Error: command exited with exit code exit status: 1

[yuuyins]

https://github.com/yarnpkg/berry/releases/tag/@yarnpkg/cli/4.0.0-rc.41

github:yarnpkg/berry/@yarnpkg/cli/4.0.0-rc.41', '@yarnpkg/cli/4.0.0-rc.41' is not a branch/tag name
Error: command exited with exit code exit status: 1

Reproduce

nix-init
Enter output path (defaults to current directory)
❯ .
Do you want to overwrite ./default.nix? (Y/n)
❯
Enter url
❯ https://github.com/yarnpkg/berry
Enter tag or revision (defaults to @yarnpkg/cli/3.5.0)
❯ @yarnpkg/cli/4.0.0-rc.41
Enter version
❯ 4.0.0-rc.41
Enter pname
❯ yarn-berry
Error: command exited with exit status: 1
stdout:

stderr:
$ nix flake prefetch --experimental-features 'nix-command flakes' --json github:yarnpkg/berry/@yarnpkg/cli/4.0.0-rc.41
error: in URL 'github:yarnpkg/berry/@yarnpkg/cli/4.0.0-rc.41', '@yarnpkg/cli/4.0.0-rc.41' is not a branch/tag name
Error: command exited with exit code exit status: 1

[figsoda]

Opened NixOS/nix#8129 to fix this

[figsoda]

NixOS/nixpkgs#226342 switches nurl to use nixVersions.unstable, which has the fix for the issue