如何解决ok1601 rt-thread编译问题？

各位好，
我使用rt-thread 来跑ok1601，直接使用keil5 编译没有问题。
但是我想使用rt-thread 的 ENV 工具来进行模块添加，添加后可以自动的加载需要的驱动文件到mdk工程里面，这样就不需要手动的一个个文件在keil5里面添加。
进入到bspimxrtOK1061-S目录，打开env，然后执行menuconfig，添加u*** host 驱动模块后，执行  scons --target=mdk5 命令重新生成工程,但是执行后就报错如下，我用官方原生的 rt-thread 测试了下是没有问题的，麻烦帮看下是什么问题呢？

QuarkAnt@DESKTOP-NA6988O F:NXPmcu_auto_samplerbspimxrtOK1061-S
> scons  --targe=mdk5
scons: Reading SConscript files ...

scons: warning: No version of Visual Studio compiler found - C/C++ compilers most likely not set correctly
File "F:NXPmcu_auto_samplerbspimxrtOK1061-SSConstruct", line 40, in

scons: warning: Calling missing SConscript without error is deprecated.
Transition by adding must_exist=0 to SConscript calls.
Missing SConscript 'buildbkapplicationsSConscript'
File "F:NXPmcu_auto_samplerbspimxrtOK1061-SbkSConscript", line 12, in
TypeError: can only concatenate list (not "NoneType") to list:
  File "F:NXPmcu_auto_samplerbspimxrtOK1061-SSConstruct", line 44:
objs = PrepareBuilding(env, RTT_ROOT)
  File "F:NXPmcu_auto_samplertoolsbuilding.py", line 405:
objs = SConscript('SConscript', variant_dir=bsp_vdir, duplicate=0)
  File "E:env_released_1.1.3envtoolsConEmuConEmu......toolsPython27Libsite-packagessconsSConsScriptSConscript.py", line 668:
return method(*args, **kw)
  File "E:env_released_1.1.3envtoolsConEmuConEmu......toolsPython27Libsite-packagessconsSConsScriptSConscript.py", line 605:
return _SConscript(self.fs, *files, **subst_kw)
  File "E:env_released_1.1.3envtoolsConEmuConEmu......toolsPython27Libsite-packagessconsSConsScriptSConscript.py", line 286:
exec(compile(scriptdata, scriptname, 'exec'), call_stack[-1].globals)
  File "F:NXPmcu_auto_samplerbspimxrtOK1061-SSConscript", line 12:
objs = objs + SConscript(os.path.join(d, 'SConscript'))