private
    val systemPropertiesPrefixedBy = newConcurrentHashSet<String>()

    private
    val undeclaredEnvironmentVariables = newConcurrentHashSet<String>()

    private
    val environmentVariablesPrefixedBy = newConcurrentHashSet<String>()

    private
    val reportedFiles = newConcurrentHashSet<File>()

    private
    val reportedDirectories = newConcurrentHashSet<File>()

    private

                    return "the set of paths ignored in file-system-check input tracking has changed"
                }
            }
            is ConfigurationCacheFingerprint.EnvironmentVariablesPrefixedBy -> input.run {
                val current = System.getenv().filterKeysByPrefix(prefix)
                if (current != snapshot) {

    }

    def "build logic can read environment variables with prefix"() {
        def configurationCache = newConfigurationCacheFixture()
        buildFile("""
            def ciVars = providers.environmentVariablesPrefixedBy("CI")
            ciVars.get().forEach((k, v) -> {
                println("Configuration: \$k = \$v")
            })

            tasks.register("print") {
                doLast {