diff --git a/build.xml b/build.xml
index 4172b626402..14ee0976e7c 100644
--- a/build.xml
+++ b/build.xml
@@ -5,6 +5,7 @@
     <property name="build.number" value="snapshot"/>
     <property name="output.name" value="kotlin-${build.number}"/>
     <property name="idea.sdk" value="${basedir}/ideaSDK"/>
+    <!-- set to false for faster build -->
 
     <import file="build-tools/build.xml" optional="false"/>
 
@@ -169,7 +170,7 @@
         </jar>
     </target>
 
-    <target name="jarjar">
+    <target name="jarjar" unless="nojarjar">
         <taskdef name="jarjar" classname="com.tonicsystems.jarjar.JarJarTask" classpath="${basedir}/dependencies/jarjar.jar"/>
         <taskdef resource="proguard/ant/task.properties" classpath="${basedir}/dependencies/proguard.jar"/>
 
@@ -299,6 +300,14 @@
         <delete file="${output}/kotlin-compiler-clean.jar" />
     </target>
 
+    <target name="nojarjar" unless="nojarjar">
+        <jar destfile="${output}/kotlin-compiler.jar">
+            <fileset dir="${output}/classes/compiler"/>
+            <fileset dir="${output}/classes/runtime"/>
+            <fileset dir="${basedir}/compiler/frontend/src" includes="jet/**"/>
+        </jar>
+    </target>
+
     <target name="clean">
         <delete dir="${output}"/>
     </target>
@@ -317,7 +326,7 @@
         <chmod dir="${kotlin-home}/bin" includes="*" perm="755"/>
     </target>
 
-    <target name="dist" depends="init,copyKotlinJars,jar,buildToolsJar,jarJDKHeaders,jarRT,jarLang,jarjar"/>
+    <target name="dist" depends="init,copyKotlinJars,jar,buildToolsJar,jarJDKHeaders,jarRT,jarLang,jarjar,nojarjar"/>
 
     <target name="doc" depends="dist"/>