diff --git a/build.xml b/build.xml
index 731d283ff24..63923acbcf7 100644
--- a/build.xml
+++ b/build.xml
@@ -221,12 +221,26 @@
         <property name="compiled.stdlib.js" value="stdlib.js" />
         <property name="stdlib.js.dir" value="${basedir}/js/js.translator/testData" />
 
-        <kotlin2js output="${output}/${compiled.stdlib.js}" noStdlib="true" main="noCall">
-            <src>
-                <fileset refid="kotlin.builtin.files" />
-                <resources refid="js.lib.files" />
-            </src>
-        </kotlin2js>
+        <!-- TODO drop workaround for bootstrapping -->
+        <if>
+            <istrue value="${bootstrap.build.no.tests}"/>
+            <then>
+                <kotlin2js output="${output}/${compiled.stdlib.js}" main="noCall">
+                    <src>
+                        <fileset refid="kotlin.builtin.files" />
+                        <resources refid="js.lib.files" />
+                    </src>
+                </kotlin2js>
+            </then>
+            <else>
+                <kotlin2js output="${output}/${compiled.stdlib.js}" noStdlib="true" main="noCall">
+                    <src>
+                        <fileset refid="kotlin.builtin.files" />
+                        <resources refid="js.lib.files" />
+                    </src>
+                </kotlin2js>
+            </else>
+        </if>
 
         <jar jarfile="${kotlin-home}/lib/kotlin-jslib.jar">
             <resources refid="js.lib.files" />