Why is there no OpenJDK 8 packaged for guix?

When I search the Guix repository there are only versions of OpenJDK from 9 and up, but I want to install OpenJDK 8. Why is there no version 8?

$ guix search openjdk | recsel -p name,version
name: openjdk
version: 9.181

name: openjdk
version: 14.0

name: openjdk
version: 13.0

name: openjdk
version: 12.33

name: openjdk
version: 11.28

name: openjdk
version: 10.46

name: icedtea
version: 1.13.13

name: java-marlin-renderer
version: 0.9.4.2

name: icedtea
version: 3.7.0

name: icedtea
version: 2.6.13