How to have Hikari take precendence as DataSource connection pool in a Sprint Boot app

application.yml

spring:
  profiles: h2
  datasource:
    url: jdbc:h2:mem:mydb;DB_CLOSE_DELAY=-1;DATABASE_TO_UPPER=false
    driver-class-name: org.h2.Driver
    data-source-class-name: org.h2.jdbcx.JdbcDataSource
    username: sa
    password: sa

HikariDataSourceConfig.java

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.autoconfigure.jdbc.DataSourceProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import com.codahale.metrics.MetricRegistry;
import com.zaxxer.hikari.HikariDataSource;

@Configuration
public class DataSourceConfig {

    @Value("${spring.datasource.data-source-class-name}")
    private String dataSourceClassName;
    
    @Autowired
    private DataSourceProperties dataSourceProperties;
    
    @Autowired
    private MetricRegistry metricRegistry;
    
    @Bean
    public HikariDataSource dataSource() {
        final HikariDataSource ds = new HikariDataSource();
        ds.setMaximumPoolSize(25); 
        ds.setDataSourceClassName(dataSourceClassName); 
        ds.addDataSourceProperty("url", dataSourceProperties.getUrl()); 
        ds.addDataSourceProperty("user", dataSourceProperties.getUsername());
        ds.addDataSourceProperty("password", dataSourceProperties.getPassword());
        ds.setMetricRegistry(metricRegistry);
        return ds;
    } 
}

pom-dependency.xml

    <!-- Connection Pooling -->
		<dependency>
  			<groupId>com.zaxxer</groupId>
  			<artifactId>HikariCP</artifactId>
  			<version>2.4.0</version>
		</dependency>

Spring Boot's DataSourceBuilder (i.e., org.springframework.boot.autoconfigure.jdbc.DataSourceBuilder) does not instantiate HikariDataSource when both Tomcat and Hikari are found on classpath.