Can't compile SVN trunk build

[Angelystor]

Hi there!
I'm trying to compile LWJGL on Snow Leopard and as the subject states, I have problems compiling it.

The ant script is dying at these lines:
/build.xml:344: Unable to load native library: Exception in thread "main" java.lang.UnsatisfiedLinkError: org.lwjgl.DefaultSysImplementation.getPointerSize()I
        at org.lwjgl.DefaultSysImplementation.getPointerSize(Native Method)
        at org.lwjgl.Sys.<clinit>(Sys.java:101)
        at org.lwjgl.test.NativeTest.invokeSys(NativeTest.java:48)
        at org.lwjgl.test.NativeTest.main(NativeTest.java:59)

I've poked around Sys and the associated classes, but I can't find out what's going on.
I've tried running the binaries and they work, but I need to get the source to compile.

Is there any environment or path I need to set?

Thanks!