EleventyHtmlBasePlugin outputs pathPrefix 3 times instead of one

[lsolesen]

Operating system

Ubuntu

Eleventy

3.0.0

Describe the bug

I started encountering a strange issue. htmlBase (https://www.11ty.dev/docs/plugins/html-base/) started outputting the base url 3 times instead of just 1, and that - of course - breaks the included stuff on the site.

The error can be seen here:

https://lsolesen.github.io/minimal-mistakes/

Crossposted here: https://discord.com/channels/741017160297611315/1308552212125057024

Reproduction steps

I am using this setup:

import { EleventyHtmlBasePlugin } from "@11ty/eleventy";

export default function (eleventyConfig) {

  // Make it possible to have the site served in a sub directory
  eleventyConfig.addPlugin(EleventyHtmlBasePlugin);
};

Seen in: https://github.com/lsolesen/minimal-mistakes/blob/11ty/_config/mainConfig.mjs

Building like this:

"build-gh-pages": "ELEVENTY_ENV=production eleventy --pathprefix=/minimal-mistakes/"

And the repos is here:

https://github.com/lsolesen/minimal-mistakes/tree/11ty

• Hopefully some of you can help me figure out, why this is happening?

Expected behavior

Only write pathPrefix one time.

Reproduction URL

https://lsolesen.github.io/minimal-mistakes/

Screenshots

No response