pipeline {
    agent {
        docker {
            image 'registry/org/buildagent'
        }
    }

    tools {
        jdk 'jdk-1.7.0_131'
        maven 'maven-3.5.0'
    }

    stages {
        stage ('Build') {
            steps {
                sh('mvn deploy')
            }
        }
    }
}

+ mvn deploy
/workspace/project@tmp/durable-d723cc26/script.sh: line 2: mvn: command not found