Cannot install older ComfyUI versions

[GiuseppeGarone]

Hi,

The install command gives me an error if I specify an older ComfyUI version (eg. 0.3.40) with --version flag:

comfy --workspace /comfyui install --version 0.3.40 --cuda-version 12.6 --nvidia

# Result error
Error: No release found for version '0.3.40'

I've also tried with the specific --commit flag but gives me another error (version should be nightly):

comfy --workspace /comfyui install --version nightly --commit <commit> --cuda-version 12.6 --nvidia

# Result error
--pr cannot be used with --version or --commit

Could it be related to the release fetching from GitHub?

Thanks.

[dosubot]

Hi @GiuseppeGarone! I'm Dosu and I’m helping the comfy-cli team.

The error "No release found for version '0.3.40'" happens when the CLI can't find a matching release tag on GitHub for the version you specified. The CLI fetches all releases from the ComfyUI GitHub repo and matches them using strict semantic versioning—if the tag doesn't exactly match (e.g., missing or extra "v" prefix, or the release doesn't exist), you'll get this error. Double-check that 0.3.40 exists as a release and that the tag matches the expected format (usually just the version number, no "v" prefix) reference.

For the "--commit" flag: the CLI only allows using --commit if --version is set to "nightly". If you try to use --commit with any other version, it will error out. There's also a known bug in the CLI's argument validation logic that can cause the error "--pr cannot be used with --version or --commit" to appear incorrectly, even if you're not using --pr. This is due to operator precedence in the code and has been discussed here reference.

If you want to install a specific commit, use:

comfy install --version nightly --commit <commit>

If you see the "--pr cannot be used..." error even when not using --pr, it's likely due to the bug mentioned above.

If the CLI can't find a release for a version you know exists, you can manually clone the repo, checkout the tag or commit you want, and install dependencies as a workaround.

Let me know if you need the exact manual steps or if you have a specific version/commit in mind!

To reply, just mention @dosu.

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