"Could not find method wrapper()" in build.gradle file generated by openapi-generator kotlin client - kotlin

Question

I have a simple spring boot project using the kotlin gradle dsl. I want to generate an OpenApi client using the openapi client generator gradle Plugin. I have successfully done so, using this configuration. Until now, this was a single project build. But when i try to include it, i get an error message "Could not find method wrapper()".
This is how i generated the client and added it's file into my source sets:
import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
plugins {
id("org.springframework.boot") version "3.0.2"
id("io.spring.dependency-management") version "1.1.0"
kotlin("jvm") version "1.7.22"
kotlin("plugin.spring") version "1.7.22"
id("org.openapi.generator") version "6.3.0"
}
// other dependencies
openApiGenerate {
generatorName.set("kotlin")
inputSpec.set("src/main/openapi/my-api.yml")
outputDir.set("$buildDir/generated/my-api")
packageName.set("com.myapi")
}
kotlin.sourceSets["main"].kotlin.srcDir("$buildDir/generated/my-api/src/main/kotlin")
Now i want to use this generated client in my project. It comes with it's own build.gradle (in groovy) which loads the necessary dependencies etc.
I have modified my settings.gradle.kts file accordingly:
rootProject.name = "myapp"
include("build:generated:my-api")
When i reload gradle, i get the follwing error:
> Could not find method wrapper() for arguments [build_gdswinwcvulw9afq79kj4v6h$_run_closure1#582f32f7] on project ':build:generated:my-api' of type org.gradle.api.Project.
This is due to the build.gradle file generated by the generator looking like this:
group 'org.openapitools'
version '1.0.0'
wrapper {
gradleVersion = '7.5'
distributionUrl = "https://services.gradle.org/distributions/gradle-$gradleVersion-all.zip"
}
buildscript {
ext.kotlin_version = '1.7.21'
repositories {
maven { url "https://repo1.maven.org/maven2" }
}
dependencies {
classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
}
}
apply plugin: 'kotlin'
apply plugin: 'maven-publish'
repositories {
maven { url "https://repo1.maven.org/maven2" }
}
test {
useJUnitPlatform()
}
dependencies {
implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
implementation "org.jetbrains.kotlin:kotlin-reflect:$kotlin_version"
implementation "com.squareup.moshi:moshi-kotlin:1.13.0"
implementation "com.squareup.moshi:moshi-adapters:1.13.0"
implementation "com.squareup.okhttp3:okhttp:4.10.0"
testImplementation "io.kotlintest:kotlintest-runner-junit5:3.4.2"
}
I am using Gradle 7.6 and i am a bit out of ideas here since i am pretty new to Gradle.