An example for a `build.gradle.kts` file of a project using KSpigot would be:

```kotlin
import org.jetbrains.kotlin.gradle.tasks.KotlinCompile

plugins {
    kotlin("jvm") version "1.5.10"
}

group = "net.axay"
version = "1.0-SNAPSHOT"

repositories {
    mavenCentral()
    maven("https://hub.spigotmc.org/nexus/content/repositories/snapshots")
}

dependencies {
    compileOnly("org.spigotmc:spigot-api:1.17-R0.1-SNAPSHOT")
    implementation("net.axay:kspigot:1.17.1")
}

tasks {
    compileJava {
        options.release.set(16)
        options.encoding = "UTF-8"
    }
    compileKotlin {
        kotlinOptions.jvmTarget = "16"
    }
}
```