Can't install on Kepler because of Birt

The version of Birt we build against does not match with version for Kepler and conflicts on ICU4j

https://jenkins.mw.lab.eng.bos.redhat.com/hudson/view/DevStudio/view/DevStudio_Trunk/job/jbosstools-4.1_trunk.install-tests-eclipseLatest-jbt_trunk/lastCompletedBuild/testReport/org.jboss.tools.tests.installation/InstallTest/testInstall/
says:

Could not install from: http://download.jboss.org/jbosstools/updates/nightly/core/trunk/
Cannot complete the install because of a conflicting dependency.
Software being installed: JBoss BIRT Integration 1.4.0.Alpha1-v20130128-1419-B356 (org.jboss.tools.birt.feature.feature.group 1.4.0.Alpha1-v20130128-1419-B356)
Software currently installed: Eclipse IDE for Java EE Developers 2.0.0.20121218-0936 (epp.package.jee 2.0.0.20121218-0936)
Only one of the following can be installed at once:
International Components for Unicode for Java (ICU4J) 4.4.2.v20110823 (com.ibm.icu 4.4.2.v20110823)
International Components for Unicode for Java (ICU4J) 50.1.0.v20121116-2 (com.ibm.icu 50.1.0.v20121116-2)
Cannot satisfy dependency:
From: Eclipse IDE for Java EE Developers 2.0.0.20121218-0936 (epp.package.jee 2.0.0.20121218-0936)
To: org.eclipse.epp.package.jee.feature.feature.group [2.0.0.20121218-0936]
Cannot satisfy dependency:
From: BIRT Chart Framework 4.2.1.v20120820-828i7EFQCnvK_6wFGvqLR (org.eclipse.birt.chart.feature.group 4.2.1.v20120820-828i7EFQCnvK_6wFGvqLR)
To: org.eclipse.birt.core [4.2.1.v201209121203]
Cannot satisfy dependency:
From: BIRT Core Package 4.2.1.v201209121203 (org.eclipse.birt.core 4.2.1.v201209121203)
To: package com.ibm.icu.lang [3.4.4,5.0.0)
Cannot satisfy dependency:
From: Eclipse e4 Rich Client Platform 1.1.0.v20121210-193513-9gFTdGWGGGduU3t_iBdO01nz-4 (org.eclipse.e4.rcp.feature.group 1.1.0.v20121210-193513-9gFTdGWGGGduU3t_iBdO01nz-4)
To: com.ibm.icu [50.1.0.v20121116-2]
Cannot satisfy dependency:
From: Java EE IDE Feature 2.0.0.20121218-0936 (org.eclipse.epp.package.jee.feature.feature.group 2.0.0.20121218-0936)
To: org.eclipse.platform.feature.group [4.3.0.v20121210-194028-9PF7VHLnG0BBkXvb-5n61JdBeLn2Lmpr5BVxLP]
Cannot satisfy dependency:
From: Eclipse Platform 4.3.0.v20121210-194028-9PF7VHLnG0BBkXvb-5n61JdBeLn2Lmpr5BVxLP (org.eclipse.platform.feature.group 4.3.0.v20121210-194028-9PF7VHLnG0BBkXvb-5n61JdBeLn2Lmpr5BVxLP)
To: org.eclipse.rcp.feature.group [4.3.0.v20121212-184727-7IAUA7Bs-QiyWqWVNz0_nT4qjCeP]
Cannot satisfy dependency:
From: Eclipse RCP 4.3.0.v20121212-184727-7IAUA7Bs-QiyWqWVNz0_nT4qjCeP (org.eclipse.rcp.feature.group 4.3.0.v20121212-184727-7IAUA7Bs-QiyWqWVNz0_nT4qjCeP)
To: org.eclipse.e4.rcp.feature.group [1.1.0.v20121210-193513-9gFTdGWGGGduU3t_iBdO01nz--4]
Cannot satisfy dependency:
From: JBoss BIRT Integration 1.4.0.Alpha1-v20130128-1419-B356 (org.jboss.tools.birt.feature.feature.group 1.4.0.Alpha1-v20130128-1419-B356)
To: org.eclipse.birt.chart.feature.group 2.5.0