Core Fantom pods bundled as individual eclipse plugins.
Fantom Runtime is used internally by the F4 IDE to run plugins and compile Fantom code.
Use Maven to compile and package Fantom Runtime (tested with Maven 3.3.9):
mvn clean package
This should create an update directory in your project root named org.fantom-updatesite. To use this newly compiled version of Fantom Runtime with F4, edit the pom.xml file in the F4 project root. Find the fantom-runtime repository and update it to reference the new update site directory:
<repository>
<snapshots>
<updatePolicy>always</updatePolicy>
</snapshots>
<id>fantom-runtime</id>
<layout>p2</layout>
<url>file:///D:/Projects/fantom-runtime/org.fantom-updatesite/target/site/</url>
</repository>
Now you can use Maven to build F4 and include your new Fantom Runtime.