diff --git a/DroidFish/.externalToolBuilders/Native_Builder.launch b/DroidFish/.externalToolBuilders/Native_Builder.launch
index b86970b..d10ba93 100644
--- a/DroidFish/.externalToolBuilders/Native_Builder.launch
+++ b/DroidFish/.externalToolBuilders/Native_Builder.launch
@@ -1,10 +1,11 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <launchConfiguration type="org.eclipse.ui.externaltools.ProgramBuilderLaunchConfigurationType">
-<stringAttribute key="org.eclipse.debug.core.ATTR_REFRESH_SCOPE" value="${working_set:&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt;&#10;&lt;launchConfigurationWorkingSet editPageId=&quot;org.eclipse.ui.resourceWorkingSetPage&quot; factoryID=&quot;org.eclipse.ui.internal.WorkingSetFactory&quot; id=&quot;1278546956920_168&quot; label=&quot;working set&quot; name=&quot;working set&quot;&gt;&#10;&lt;item factoryID=&quot;org.eclipse.ui.internal.model.ResourceFactory&quot; path=&quot;/DroidFish/libs&quot; type=&quot;2&quot;/&gt;&#10;&lt;/launchConfigurationWorkingSet&gt;}"/>
+<stringAttribute key="org.eclipse.debug.core.ATTR_REFRESH_SCOPE" value="${working_set:&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt;&#10;&lt;resources&gt;&#10;&lt;item path=&quot;/DroidFish/libs&quot; type=&quot;2&quot;/&gt;&#10;&lt;/resources&gt;}"/>
 <booleanAttribute key="org.eclipse.debug.ui.ATTR_LAUNCH_IN_BACKGROUND" value="false"/>
-<stringAttribute key="org.eclipse.ui.externaltools.ATTR_BUILD_SCOPE" value="${working_set:&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt;&#10;&lt;launchConfigurationWorkingSet editPageId=&quot;org.eclipse.ui.resourceWorkingSetPage&quot; factoryID=&quot;org.eclipse.ui.internal.WorkingSetFactory&quot; id=&quot;1278546974224_175&quot; label=&quot;workingSet&quot; name=&quot;workingSet&quot;&gt;&#10;&lt;item factoryID=&quot;org.eclipse.ui.internal.model.ResourceFactory&quot; path=&quot;/DroidFish/jni&quot; type=&quot;2&quot;/&gt;&#10;&lt;/launchConfigurationWorkingSet&gt;}"/>
+<stringAttribute key="org.eclipse.ui.externaltools.ATTR_BUILD_SCOPE" value="${working_set:&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt;&#10;&lt;resources&gt;&#10;&lt;item path=&quot;/DroidFish/jni&quot; type=&quot;2&quot;/&gt;&#10;&lt;/resources&gt;}"/>
 <stringAttribute key="org.eclipse.ui.externaltools.ATTR_LOCATION" value="${env_var:NDK}/ndk-build"/>
 <stringAttribute key="org.eclipse.ui.externaltools.ATTR_RUN_BUILD_KINDS" value="full,incremental,auto,"/>
+<stringAttribute key="org.eclipse.ui.externaltools.ATTR_TOOL_ARGUMENTS" value="-j4"/>
 <booleanAttribute key="org.eclipse.ui.externaltools.ATTR_TRIGGERS_CONFIGURED" value="true"/>
 <stringAttribute key="org.eclipse.ui.externaltools.ATTR_WORKING_DIRECTORY" value="${workspace_loc:/DroidFish}"/>
 </launchConfiguration>