build on aws emr cluster fails

[saibabug]

Hi
I'm new to Java , Hadoop and AWS. So i'm posting issue after i tried so much of google search
Facing below error while executing build.sh on emr cluster
src/map/Words.java:24: error: package org.apache.hadoop.io does not exist
import org.apache.hadoop.io.;
^
src/map/Words.java:25: error: package org.apache.hadoop.mapred does not exist
import org.apache.hadoop.mapred.;
^
src/map/Words.java:28: error: cannot find symbol
public class Words extends MapReduceBase