Build exception when installed as a plugin

[Sam Harwell]

java.lang.NullPointerException
    at java.io.File.<init>(File.java:222)
    at org.tvl.goworks.project.GoActionProvider.executeImpl(GoActionProvider.java:423)
    at org.tvl.goworks.project.GoActionProvider.access$100(GoActionProvider.java:78)
    at org.tvl.goworks.project.GoActionProvider$7.run(GoActionProvider.java:310)
Caused: java.lang.RuntimeException
    at org.tvl.goworks.project.GoActionProvider$7.run(GoActionProvider.java:320)
    at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1454)
    at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2036)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to
    at org.openide.util.RequestProcessor.post(RequestProcessor.java:424)
    at org.tvl.goworks.project.GoActionProvider.execute(GoActionProvider.java:326)
    at org.tvl.goworks.project.GoActionProvider.execute(GoActionProvider.java:245)
    at org.tvl.goworks.project.GoActionProvider.handleBuildAction(GoActionProvider.java:183)
    at org.tvl.goworks.project.GoActionProvider.invokeAction(GoActionProvider.java:113)
    at org.netbeans.modules.project.ui.actions.ProjectAction$1.run(ProjectAction.java:158)
    at org.openide.util.Mutex.doEvent(Mutex.java:1343)
    at org.openide.util.Mutex.writeAccess(Mutex.java:457)
    at org.netbeans.modules.project.ui.actions.ProjectAction.runSequentially(ProjectAction.java:155)
    at org.netbeans.modules.project.ui.actions.ProjectAction.actionPerformed(ProjectAction.java:129)
    at org.netbeans.modules.project.ui.actions.LookupSensitiveAction.actionPerformed(LookupSensitiveAction.java:174)
    at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2028)
    at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2351)
    at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
    at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
    at javax.swing.AbstractButton.doClick(AbstractButton.java:389)
    at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:809)
    at com.apple.laf.AquaMenuItemUI.doClick(AquaMenuItemUI.java:137)
    at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:850)
    at java.awt.Component.processMouseEvent(Component.java:6382)
    at javax.swing.JComponent.processMouseEvent(JComponent.java:3275)
    at java.awt.Component.processEvent(Component.java:6147)
    at java.awt.Container.processEvent(Container.java:2083)
    at java.awt.Component.dispatchEventImpl(Component.java:4744)
    at java.awt.Container.dispatchEventImpl(Container.java:2141)
    at java.awt.Component.dispatchEvent(Component.java:4572)
    at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4619)
    at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4280)
    at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4210)
    at java.awt.Container.dispatchEventImpl(Container.java:2127)
    at java.awt.Window.dispatchEventImpl(Window.java:2489)
    at java.awt.Component.dispatchEvent(Component.java:4572)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:704)
    at java.awt.EventQueue.access$400(EventQueue.java:82)
    at java.awt.EventQueue$2.run(EventQueue.java:663)
    at java.awt.EventQueue$2.run(EventQueue.java:661)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)
    at java.awt.EventQueue$3.run(EventQueue.java:677)
    at java.awt.EventQueue$3.run(EventQueue.java:675)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:674)
    at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:158)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:296)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:211)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:201)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:196)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:188)
[catch] at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)