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Removing `kotlin-dsl` lets the extension function resolve.

Iirc it should automatically have `stdlib-jdk8`. What's the code in question?

The code
```val path: Path = &lt;temppath&gt;
val expected = """
    &lt;expected dockerfile contents&gt;
""".trimIndent()
val actual = path.resolve("build/docker/Dockerfile").toFile().readText()
assertEquals(expected, actual)```
Specifically I have to call `toFile().readText()` because I can't get the `Path.readText()` method to resolve

the only diff between good-plugin or bad-plugin is `kotlin-dsl`

Although Gradle 7.5 bundles Kotlin 1.6.21, it still uses api version and language version 1.4 as that is what the 7.x line started with, to not break existing code in a minor Gradle version as far as possible.
The `kotlin-dsl` plugin also sets this api and language version accordingly.

I guess with Gradle 8.x it will be raised to 1.6, or even 1.7 if until then 1.7 is embedded.
Btw. you can use `kotlin("jvm") version embeddedKotlinVersion` in good-plugin to have the embedded kotlin version.