/usr/share/maven-repo/co/tomlee/gradle/plugins/gradle-jflex-plugin/debian/gradle-jflex-plugin-debian.jar is in libgradle-jflex-plugin-java 0.0.2-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/maven-repo/co/tomlee/gradle/plugins/gradle-jflex-plugin/debian/../../../../../../../java/gradle-jflex-plugin-0.0.2.jar