build against S-4.12RC2-201906051800
diff --git a/features/org.eclipse.objectteams.otdt.core.patch/feature.xml b/features/org.eclipse.objectteams.otdt.core.patch/feature.xml
index c510740..d62d9ef 100644
--- a/features/org.eclipse.objectteams.otdt.core.patch/feature.xml
+++ b/features/org.eclipse.objectteams.otdt.core.patch/feature.xml
@@ -59,7 +59,7 @@
    </url>
 
    <requires>
-      <import feature="org.eclipse.jdt" version="3.18.0.v20190529-2158" patch="true"/>
+      <import feature="org.eclipse.jdt" version="3.18.0.v20190605-1800" patch="true"/>
    </requires>
 
    <plugin
diff --git a/releng/build-scripts/build/otdt_prerequisites-hipp.sh b/releng/build-scripts/build/otdt_prerequisites-hipp.sh
index fa8bce1..6bf7aeb 100644
--- a/releng/build-scripts/build/otdt_prerequisites-hipp.sh
+++ b/releng/build-scripts/build/otdt_prerequisites-hipp.sh
@@ -65,11 +65,11 @@
 
 # -- Base for testing: --
 # Eclipse SDK build identifier (used for substitution in otdt.map.in etc.):
-SDK_QUALIFIER=${SDK_QUALIFIER:="I20190529-2005"}
+SDK_QUALIFIER=${SDK_QUALIFIER:="I20190605-1800"}
 
 # used only locally (components of the ECLIPSE_SDK_TGZ path):
-EVERSION=${EVERSION:="I20190529-2005"}
-DROP=${DROPS4}/${DROP:="I20190529-2005"}
+EVERSION=${EVERSION:="4.12RC2"}
+DROP=${DROPS4}/${DROP:="S-4.12RC2-201906051800"}
 
 # EXPORT: archive file of the base eclipse SDK build:
 ECLIPSE_SDK_TGZ=${DROP}/eclipse-SDK-${EVERSION}-linux-gtk-${ARCH}.tar.gz
diff --git a/releng/build-scripts/build/run.properties b/releng/build-scripts/build/run.properties
index ab62011..7a79252 100644
--- a/releng/build-scripts/build/run.properties
+++ b/releng/build-scripts/build/run.properties
@@ -25,8 +25,8 @@
 org.eclipse.equinox.launcher_jar=org.eclipse.equinox.launcher_1.5.400.v20190515-0925.jar
 
 # for patching our patch feature to match this version with any suffix:
-jdt.feature.version=3.18.0.v20190529-2158
-jdt.feature.version.next=3.18.0.v20190529-2159
+jdt.feature.version=3.18.0.v20190605-1800
+jdt.feature.version.next=3.18.0.v20190605-1801
 
 # jdt.core fragments for extracting pre-built classes and properties:
 jdt.compiler.apt=org.eclipse.jdt.compiler.apt_1.3.600.v20190402-0634.jar