<dependency>
  <groupId>org.jruby.extras</groupId>
  <artifactId>jffi</artifactId>
  <version>1.0.4</version>
</dependency>

implementation 'org.jruby.extras:jffi:1.0.4'

implementation("org.jruby.extras:jffi:1.0.4")

libraryDependencies += "org.jruby.extras" % "jffi" % "1.0.4"

@Grapes(
  @Grab(group='org.jruby.extras', module='jffi', version='1.0.4')
)

<dependency org="org.jruby.extras" name="jffi" rev="1.0.4" />

[org.jruby.extras/jffi "1.0.4"]

'org.jruby.extras:jffi:jar:1.0.4'