diff --git a/sigil/eclipse/ui/.classpath b/sigil/eclipse/ui/.classpath
index 03621b5..fce9fdb 100644
--- a/sigil/eclipse/ui/.classpath
+++ b/sigil/eclipse/ui/.classpath
@@ -2,7 +2,7 @@
 <classpath>
 	<classpathentry kind="src" path="src"/>
 	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
-	<classpathentry kind="con" path="org.cauldron.sigil.core.classpathContainer"/>
+	<classpathentry kind="con" path="org.apache.felix.sigil.classpathContainer"/>
 	<classpathentry kind="lib" path="lib/org.eclipse.swt.carbon.macosx.jar"/>
 	<classpathentry kind="output" path="build/classes"/>
 </classpath>
diff --git a/sigil/eclipse/ui/.project b/sigil/eclipse/ui/.project
index 8dbab11..35b56c2 100644
--- a/sigil/eclipse/ui/.project
+++ b/sigil/eclipse/ui/.project
@@ -11,13 +11,13 @@
 			</arguments>
 		</buildCommand>
 		<buildCommand>
-			<name>org.cauldron.sigil.core.newtonBuilder</name>
+			<name>org.apache.felix.sigil.eclipse.core.sigilBuilder</name>
 			<arguments>
 			</arguments>
 		</buildCommand>
 	</buildSpec>
 	<natures>
+		<nature>org.apache.felix.sigil.sigilnature</nature>
 		<nature>org.eclipse.jdt.core.javanature</nature>
-		<nature>org.cauldron.sigil.core.newtonnature</nature>
 	</natures>
 </projectDescription>