title: Error when building Netbeans 11.0 from source
body: <p>I installed Apache Ant version 1.10.5 on my Windows 10 desktop system in order to build Netbeans 11.0 from source. I set the environmental variables and ant seems to be running properly. However, when I cd to the Netbeans folder and run ant to build it, I get the following error:</p>
  
  <pre><code>BUILD FAILED
  E:\Netbeans 11.0\nbbuild\build.xml:514: The following error occurred while executing this line:
  E:\Netbeans 11.0\nbbuild\build.xml:509: The following error occurred while executing this line:
  E:\Netbeans 11.0\nbbuild\build.xml:556: The following error occurred while executing this line:
  E:\Netbeans 11.0\nb\updatecenters\build.xml:44: exec returned: 1
  </code></pre>
  
  <p>Does anyone have any idea what would be causing this or where I could look up what the possible causes of "exec returned: 1" could be? Also, I am using jdk1.8.0_212.</p>
  
  <p>Here is the surrounding code for the build.xml file:</p>
  
  <pre><code>39  &lt;target name="bootstrap" description="Bootstrap NetBeans-specific Ant extensions."
  40          depends="-jdk-init,-load-build-properties"&gt;
  41    &lt;fail message="You need to run on JDK 8+ to build NetBeans; java.home=${java.home}"&gt;
  42        &lt;condition&gt;
  43            &lt;matches pattern="^1\.[01234567].*" string="${java.version}"/&gt;
  44        &lt;/condition&gt;
  </code></pre>