diff --git a/releng/releng-target/xtext-core.target.target b/releng/releng-target/xtext-core.target.target
index e9e217be0..9e4ee5e53 100644
--- a/releng/releng-target/xtext-core.target.target
+++ b/releng/releng-target/xtext-core.target.target
@@ -2,19 +2,19 @@
 <?pde version="3.8"?>
 <target name="org.eclipse.xtext.helios.target" sequenceNumber="0">
 	<locations>
-		<location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="false" type="InstallableUnit">
+		<location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
 			<repository location="https://download.eclipse.org/modeling/tmf/xtext/updates/releases/2.20.0"/>
 			<unit id="org.eclipse.xtext.sdk.feature.group" version="0.0.0"/>
 		</location>
-		<location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="false" type="InstallableUnit">
+		<location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
 			<repository location="https://download.eclipse.org/modeling/emf/emf/builds/release/2.20"/>
 			<unit id="org.eclipse.emf.sdk.feature.group" version="0.0.0"/>
 		</location>
-		<location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="false" type="InstallableUnit">
+		<location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
 			<repository location="https://download.eclipse.org/modeling/emft/mwe/updates/releases/2.11.3/"/>
 			<unit id="org.eclipse.emf.mwe2.language.sdk.feature.group" version="0.0.0"/>
 		</location>
-		<location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="false" type="InstallableUnit">
+		<location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
 			<repository location="https://download.eclipse.org/releases/oxygen/201804111000"/>
 		</location>
 		<location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">