-# We need to find tools in the toolchain and in the install directory.
-export PATH=$PREFIX/bin:$TOOLCHAIN/bin:$PATH
+# Remove build directory contents (if any) and create a new build dir.
+rm -rf $BUILDDIR
+mkdir $BUILDDIR
+cd $BUILDDIR
+
+# Build host Python before we start messing with the environment.
+wget http://python.org/ftp/python/$VER_PYTHON/Python-$VER_PYTHON.tar.xz
+tar xJf Python-$VER_PYTHON.tar.xz
+cd Python-$VER_PYTHON
+./configure
+make python
+make Parser/pgen
+mv python hostpython
+mv Parser/pgen Parser/hostpgen
+cd ..
+
+# -----------------------------------------------------------------------------
+
+# We need to find tools in the toolchain.
+export PATH=$TOOLCHAIN/bin:$PATH