OpeHAB build errors on eclipse

Hello All,

I am trying to build OpenHA, I have downloaded source from https://github.com/openhab/openhab
Imported into eclipse workspace as Maven Project.

Attahced error image.

after finish tycho plugin installed and eclipse restarted and build
Here are the build errors:

Description Resource Path Location Type
Plugin execution not covered by lifecycle configuration: com.savage7.maven.plugins:maven-external-dependency-plugin:0.4:resolve-external (execution: resolve-install-external-dependencies, phase: process-resources) pom.xml /org.openhab.io.multimedia.tts.marytts line 196 Maven Project Build Lifecycle Mapping Problem

Plugin execution not covered by lifecycle configuration: org.apache.karaf.tooling:karaf-maven-plugin:4.0.3:features-generate-descriptor (execution: default-features-generate-descriptor, phase: compile) pom.xml /openhab-addons line 31 Maven Project Build Lifecycle Mapping Problem

Plugin execution not covered by lifecycle configuration: org.apache.openjpa:openjpa-maven-plugin:2.4.0:enhance (execution: enhancer, phase: process-classes) pom.xml /org.openhab.persistence.jpa line 43 Maven Project Build Lifecycle Mapping Problem