Evaluate shell script in environment variable only once in Jenkins declarative pipeline

Question

I'm using following way to evaluate a shell script and use its output as environment variable:

pipeline {
    agent { ... }
    stages {
        stage('Test') {
            environment {
                TEST_SCRIPT = "${sh(script: 'echo "This should be evaluated only once"', returnStdout: true)}"
                TEST_USAGE = "${env.TEST_SCRIPT} and ${env.TEST_SCRIPT}"
            }
            steps {
                sh 'printenv | grep TEST | sort'
            }
        }
    }
}

Works as expected and output "This should be evaluated only once" is written to env var TEST_SCRIPT. But when I'm using env var TEST_SCRIPT in other env var (e.g. TEST_USAGE in example), the script is evaluated multiple times:

Is it possible to store resulting output in TEST_SCRIPT instead of executing it multiple times?