diff --git a/sigil/eclipse/core/.classpath b/sigil/eclipse/core/.classpath
index e26ebfb..ef0616d 100644
--- a/sigil/eclipse/core/.classpath
+++ b/sigil/eclipse/core/.classpath
@@ -1,14 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <classpath>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/J2SE-1.5"/>
-	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins">
-		<accessrules>
-			<accessrule kind="accessible" pattern="org/cauldron/newton/descriptor/**"/>
-			<accessrule kind="accessible" pattern="org/eclipse/pde/internal/**"/>
-		</accessrules>
-	</classpathentry>
-	<classpathentry kind="con" path="org.eclipse.jdt.junit.JUNIT_CONTAINER/3"/>
 	<classpathentry kind="src" path="src"/>
 	<classpathentry exported="true" kind="lib" path="lib/commons-lang-2.4.jar" sourcepath="org.cauldron.sigil.coresrc.zip"/>
+	<classpathentry kind="con" path="org.cauldron.sigil.core.classpathContainer"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/J2SE-1.5"/>
 	<classpathentry kind="output" path="build/classes"/>
 </classpath>
diff --git a/sigil/eclipse/core/.project b/sigil/eclipse/core/.project
index ed75ac8..71a8094 100644
--- a/sigil/eclipse/core/.project
+++ b/sigil/eclipse/core/.project
@@ -11,18 +11,13 @@
 			</arguments>
 		</buildCommand>
 		<buildCommand>
-			<name>org.eclipse.pde.ManifestBuilder</name>
-			<arguments>
-			</arguments>
-		</buildCommand>
-		<buildCommand>
-			<name>org.eclipse.pde.SchemaBuilder</name>
+			<name>org.cauldron.sigil.core.newtonBuilder</name>
 			<arguments>
 			</arguments>
 		</buildCommand>
 	</buildSpec>
 	<natures>
-		<nature>org.eclipse.pde.PluginNature</nature>
 		<nature>org.eclipse.jdt.core.javanature</nature>
+		<nature>org.cauldron.sigil.core.newtonnature</nature>
 	</natures>
 </projectDescription>
diff --git a/sigil/eclipse/core/sigil.properties b/sigil/eclipse/core/sigil.properties
new file mode 100644
index 0000000..b76b23a
--- /dev/null
+++ b/sigil/eclipse/core/sigil.properties
@@ -0,0 +1,37 @@
+
+# sigil project file, saved by plugin.
+
+version: 0.0.0
+
+-bundles: \
+	org.cauldron.sigil.core, \
+
+-sourcedirs: \
+	src, \
+
+-imports: \
+	org.apache.felix.sigil.config, \
+	org.apache.felix.sigil.core, \
+	org.apache.felix.sigil.model, \
+	org.apache.felix.sigil.model.common, \
+	org.apache.felix.sigil.model.eclipse, \
+	org.apache.felix.sigil.model.osgi, \
+	org.apache.felix.sigil.repository, \
+	org.eclipse.core.runtime;resolve=compile, \
+	org.eclipse.core.resources;version=3.4.1, \
+	org.eclipse.core.runtime;version=3.4.0, \
+	org.eclipse.core.runtime.jobs;version=3.4.0, \
+	org.eclipse.debug.core;version=3.4.0, \
+	org.eclipse.jdt.core;version=3.4.2, \
+	org.eclipse.jface.dialogs;version=3.4.1, \
+	org.eclipse.jface.preference;version=3.4.1, \
+	org.eclipse.jface.resource;version=3.4.1, \
+	org.eclipse.jface.util;version=3.4.1, \
+	org.eclipse.ui;version=3.4.1, \
+	org.eclipse.ui.dialogs;version=3.4.1, \
+	org.eclipse.ui.plugin;version=3.4.1, \
+	org.osgi.framework;version=1.4.0, \
+	org.osgi.service.prefs;version=1.1.0, \
+	org.osgi.util.tracker;version=1.3.3, \
+
+# end