Default paths can be changed: KCABI_KC, KCABI_CACHE, KCABI_REF, KCABI_DUMPS, KCABI_ROOT, LLVM_OBJDUMP. dump.py writes to ./dumps/<build> by default and runs without a reference dump.
refresh.py no longer builds one particular kext: it prints the verdict, sets its exit status (0, 3, 4) and runs the build command given after --.