12:46:30 [ERROR] Failed to execute goal on project org.eclipse.xtext.ui: Could not resolve dependencies for project org.eclipse.xtext:org.eclipse.xtext.ui:eclipse-plugin:2.29.0-SNAPSHOT: The following artifacts could not be resolved: org.eclipse.xtend:org.eclipse.xtend.lib:jar:2.29.0.M3, org.eclipse.xtext:org.eclipse.xtext.xbase.lib:jar:2.29.0.M3, org.eclipse.xtend:org.eclipse.xtend.lib.macro:jar:2.29.0.M3, org.eclipse.xtext:org.eclipse.xtext:jar:2.29.0.M3, org.eclipse.xtext:org.eclipse.xtext.util:jar:2.29.0.M3, org.eclipse.xtext:org.eclipse.xtext.ide:jar:2.29.0.M3: Could not find artifact org.eclipse.xtend:org.eclipse.xtend.lib:jar:2.29.0.M3 in eclipse.maven.central.mirror (https://repo.eclipse.org/content/repositories/maven_central/) -> [Help 1]

@laeubi do you have a hint how to find out why these dependencies are tried to be resolved from maven central at all if they are p2 dependencies?