Trouble compiling my HIVE Serde

hive.error

Buildfile: /Users/peyomp/serde/build.xml

compile:
    [javac] /Users/peyomp/serde/build.xml:30: warning: 'includeantruntime' was not set, defaulting to build.sysclasspath=last; set to false for repeatable builds
    [javac] Compiling 1 source file to /Users/peyomp/serde/build/classes
    [javac] /Users/peyomp/serde/src/TimeSeries.java:3: package org.apache.hadoop.hive.ql.exec does not exist
    [javac] import org.apache.hadoop.hive.ql.exec.UDF;
    [javac]                                      ^
    [javac] /Users/peyomp/serde/src/TimeSeries.java:6: cannot find symbol
    [javac] symbol: class UDF
    [javac] public final class TimeSeries extends UDF {
    [javac]                                       ^
    [javac] 2 errors

BUILD FAILED
/Users/peyomp/serde/build.xml:30: Compile failed; see the compiler error output for details.