Include the following dependency in your pom.xml
<dependency>
<groupId>io.github.wouter-bauweraerts</groupId>
<artifactId>instancio-fixture-builder</artifactId>
<version>5.0.2</version>
</dependency>
Check the Maven Central Repository for the most recent version. There you can also find how to include it with different build systems.
Check Documentation site for more details