fresh checkout build problems

02:00:36 (157.60 KB/s) - `bcel-5.1.tar.gz' saved [2230306/2230306]

touch tasks/download_bcel
mkdir -p build
cd build && \
        gzip -dc  ../download/bcel-5.1.tar.gz | tar xf - && \
        rm -f bcel && \
        ln -s bcel-5.1 bcel
tar: A lone zero block at 57174
touch tasks/extract_bcel
make[3]: Leaving directory 
`/usr/src/ibex/simplex_core/upstream/nestedvm/upstream'
javac -classpath build:upstream/build/bcel-5.1/bcel-5.1.jar -d build 
src/org/xwt/mips/ClassFileCompiler.java 
src/org/xwt/mips/ClassLoader.java src/org/xwt/mips/Compiler.java 
src/org/xwt/mips/ELF.java src/org/xwt/mips/Interpreter.java 
src/org/xwt/mips/JavaSourceCompiler.java src/org/xwt/mips/Registers.java 
src/org/xwt/mips/Runtime.java src/org/xwt/mips/UnixRuntime.java 
src/org/xwt/mips/UsermodeConstants.java 
src/org/xwt/mips/util/SeekableByteArray.java 
src/org/xwt/mips/util/SeekableData.java 
src/org/xwt/mips/util/SeekableFile.java 
src/org/xwt/mips/util/SeekableInputStream.java 
build/org/xwt/mips/UsermodeConstants.java
build/org/xwt/mips/UsermodeConstants.java:2: duplicate class: 
org.xwt.mips.UsermodeConstants
public interface UsermodeConstants {
       ^
1 error
make[2]: *** [build/org/xwt/mips/ClassFileCompiler.class] Error 1
make[2]: Leaving directory `/usr/src/ibex/simplex_core/upstream/nestedvm'
make[1]: *** [.build_nestedvm] Error 2
make[1]: Leaving directory `/usr/src/ibex/simplex_core'
make: *** [JVM] Error 2


-Tupshin