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according to the docs at <https://plugins.gradle.org/docs/publish-plugin>
if you are using the Kotlin DSL, it should be `website.set("...")` etc.

if you are using the Groovy DSL, then I'm not sure. perhaps something else in your buildscript classpath is keeping you on the older version.

`gradlePlugin { ... }` is not part of the `com.gradle.plugin-publish` plugin, but part of the `java-gradle-plugin` which is built-in into Gradle and thus depends on the version of Gradle not of the plugin publish plugin. In Gradle 6.8.2 there is no `website` property in the extension of the `java-gradle-plugin`, that was only added in 7.6.

That's btw. also what the linked-to docs say in the Examples section:
&gt; <https://plugins.gradle.org/plugin/com.gradle.plugin-publish|Plugin Publish plugin v1.0.0> simplifies the configuration of plugin publishing by merging the `pluginBundle` block into the `gradlePlugin` one.
&gt; These simplifications however require backing support in the Gradle API, so are only available when using the Plugin Publish Plugin with Gradle v7.6 or later.

So I guess with 6.8.2 you just continue configuring the website and maybe other things in the `pluginBundle` block.