<jjtree target="src/Parser.jjt" outputdirectory="build/src" javacchome="c:/program files/JavaCC" nodeusesparser="true" />This invokes JJTree on grammar file src/Parser.jjt, writing the generated grammar file, Parser.jj, file to build/src. The grammar option NODE_USES_PARSER is set to true when invoking JJTree.