Runtime environment variable in jib args?

Question

How do I make it so that Kubernetes replaces \$(ENV) with the runtime value of the ENV environment variable when the container is started?

//build.gradle.kts
jib {
  from.image = "prom/prometheus"
  to {
    image = "${dockerRepository}/${project.name}:${project.version}"
  }
  container {
    ports = listOf("8080")
    environment = mapOf(
      "FOO" to "BAR"
    )
    entrypoint = listOf("INHERIT")
    args = listOf(
      "--enable-feature=agent",
      "--config.file=/etc/prometheus/\$(ENV)/prometheus.yml",
      "--web.console.libraries=/usr/share/prometheus/console_libraries",
      "--web.console.templates=/usr/share/prometheus/consoles",
      "--web.listen-address=0.0.0.0:8080",
    )
  }
}