You need to start with a valid runPaper setup as described here. Most properties should be supported.
import com.infernalsuite.useSlimeWorldPaper
// alternatively: import com.infernalsuite.useSlimeWorldPurpur
// alternatively: import com.infernalsuite.useSlimeWorldPufferfish
plugins {
// Apply the plugin
id("xyz.jpenilla.run-paper") version "2.2.0"
id("com.infernalsuite.run-paper") version "1.0.0"
}
tasks {
runServer {
minecraftVersion("1.21.4")
useSlimeWorldPaper()
// alternatively: useSlimeWorldPurpur()
// alternatively: useSlimeWorldPufferfish()
}
}
Then run the task as you would with regular runPaper: gradlew :runServer