diff --git a/start-builder.sh b/start-builder.sh
index 7bcc528464fb3890ad8a5b2660d38335583adbd1..a356cd312038c547a2e91e97ce96b4d88a40d2de 100644
--- a/start-builder.sh
+++ b/start-builder.sh
@@ -1,3 +1,5 @@
 #!/bin/sh
-JAVA_FILES=$(find /src/ -name '*.java')
-java -jar rd-builder.jar -d /data -bootclasspath $BOOT_CLASSPATH $JAVA_FILES
+TARGET=${1:-/data}
+SOURCE=${2:-/src/}
+JAVA_FILES=$(find $SOURCE -name '*.java')
+java -jar rd-builder.jar -d $TARGET -bootclasspath $BOOT_CLASSPATH $JAVA_FILES