build.xml in aslakhellesoy-cucumber-0.3.8

- old
+ new

@@ -4,9 +4,16 @@
     <javac srcdir="src" destdir="build" />
   </target>
 
   <target name="cucumber" depends="compile" description="Run Cucumber">
     <property environment="ENV" />
+    <fail unless="ENV.JRUBY_HOME">
+      (::) ERROR (::)
+      Define JRUBY_HOME in your shell. For example:
+      
+      export JRUBY_HOME=/usr/local/jruby
+      set JRUBY_HOME=C:\jruby
+    </fail>
     <java classname="org.jruby.Main" fork="true" failonerror="true">
       <classpath>
         <pathelement path="${ENV.JRUBY_HOME}/lib/jruby.jar"/>
         <pathelement path="build"/>
       </classpath>
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