I downloaded sources from CVS then started "build.bat". And I saw:
Buildfile: build.xml
init:
[echo] --------------------------------------------------------------
[echo] Setting up customized ant tasks...
[javac] Compiling 1 source file to D:\cvs\jakarta-poi\tools\tmp\anttasks
[javac]
D:\cvs\jakarta-poi\tools\centipede\src\java\IZPressHtmlCompressTask.
java:9: Package com.izforge.izpress not found in import.
[javac] import com.izforge.izpress.*;
[javac] ^
[javac] 1 error
BUILD FAILED
D:\cvs\jakarta-poi\build.xml:36: Compile failed, messages should have been
provided.
Total time: 6 seconds