I'm doing the a) step from http://community.jboss.org/wiki/HowToBuildJBossToolsWithMaven3 and get the following exception:

igels@alexey-desktop:~/Projects/jbt-3.3/trunk$ mvn clean install -f build/parent/pom.xml -Dmaven.repo.local=.repository
[INFO] Scanning for projects...
[WARNING] No explicit target runtime environment configuration. Build is platform dependent.
[ERROR] Internal error: java.lang.RuntimeException: Could not resolve target platform specification artifact org.jboss.tools:org.jboss.tools.target.platform:target:unified:0.0.3-SNAPSHOT -> [Help 1]
org.apache.maven.InternalErrorException: Internal error: java.lang.RuntimeException: Could not resolve target platform specification artifact org.jboss.tools:org.jboss.tools.target.platform:target:unified:0.0.3-SNAPSHOT
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:168)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:616)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
Caused by: java.lang.RuntimeException: Could not resolve target platform specification artifact org.jboss.tools:org.jboss.tools.target.platform:target:unified:0.0.3-SNAPSHOT
at org.codehaus.tycho.resolver.DefaultTargetPlatformConfigurationReader.getTarget(DefaultTargetPlatformConfigurationReader.java:196)
at org.codehaus.tycho.resolver.DefaultTargetPlatformConfigurationReader.getTargetPlatformConfiguration(DefaultTargetPlatformConfigurationReader.java:53)
at org.codehaus.tycho.resolver.DefaultTychoDependencyResolver.resolveProject(DefaultTychoDependencyResolver.java:57)
at org.codehaus.tycho.maven.TychoMavenLifecycleParticipant.afterProjectsRead(TychoMavenLifecycleParticipant.java:94)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:273)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
... 11 more
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/InternalErrorException