Errors when building

Hello, I am trying to build TortoiseSVN v1.3.3.6219 using nant setup

I have installed everything from build.txt. The problem I'm having is with
the following lines:

     [nant] C:\devel\tortoise\SVN\TortoiseSVN\ext\build\default.build build
            Buildfile:
file:///C:/devel/tortoise/SVN/TortoiseSVN/ext/build/default.build
            Target framework: Microsoft .NET Framework 1.1
            Target(s) specified: build

            build:

                 [nant]
C:\devel\tortoise\SVN\TortoiseSVN\ext\build\apr.build build
                        Buildfile:
file:///C:/devel/tortoise/SVN/TortoiseSVN/ext/build/apr.build
                        Target framework: Microsoft .NET Framework 1.1
                        Target(s) specified: build

                        build:

                        BUILD FAILED

C:\devel\tortoise\SVN\TortoiseSVN\ext\build\apr.build(23,4):
                        Could not find file
'C:\devel\tortoise\SVN\TortoiseSVN\ext\apr\include\apr.hw' to copy.

                        Total time: 0 seconds.

            BUILD FAILED

            Nested build failed. Refer to build log for exact reason.

            Total time: 0.2 seconds.

apr.build (23,4) consists of this line:
<copy file="include\apr.hw" tofile="include\apr.h" overwrite="true" />
So nant can't find apr.hw. I searched my whole C: and it wasn't found
anywhere. Am I missing a package? Here's what I installed:
vs2005
python 24
activeperl 5.8.7 (previously installed)
java runtime 5.0
libxml2
wix
nsis
nant
Received on Thu Apr 6 22:51:26 2006