final boolean didRemove;
        if (spec.isIncrementalCompile()) {
            didRemove = deleteOutputsForRemovedSources(spec);
        } else {
            didRemove = cleanPreviousOutputs(spec);
        }

        WorkResult compileResult = compile(spec);
        return WorkResults.didWork(didRemove || compileResult.getDidWork());
    }

    protected WorkResult compile(SwiftCompileSpec spec) {

            LOGGER.info("Skipping {} as it has no source files and no previous output files.", work.getDisplayName());
            skipOutcome = ExecutionOutcome.SHORT_CIRCUITED;
        } else {
            boolean didWork = cleanPreviousOutputs(outputFilesAfterPreviousExecution);
            if (didWork) {
                LOGGER.info("Cleaned previous output of {} as it has no source files.", work.getDisplayName());

        boolean deleted = cleanPreviousOutputs(spec);
        spec.setSourceFilesForPch(getSourceFilesForPch(spec));
        WorkResult compileResult = delegateCompiler.execute(spec);
        if (deleted && !compileResult.getDidWork()) {
            return WorkResults.didWork(true);
        }
        return compileResult;
    }

    private boolean cleanPreviousOutputs(NativeCompileSpec spec) {