Worker Pages: change build command

I created a Workers page with the wrong build command. I see no panel where I could correct the command. The following doc page is not helpful: https://developers.cloudflare.com/pages/configuration/build-configuration/

Only option i see now if to recreate a new pages project. That's fine, but am I missing something?
Cloudflare Docs
You may tell Cloudflare Pages how your site needs to be built as well as where its output files will be located.
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