cpython/3.7.7: WARN: Build folder is dirty, removing it: C:\J\c3ipr\pr_1510_20_4_46\.conan\data\cpython\3.7.7\_\_\build\298e77470aed65ffc0d06f5a94383d156ebefe8c
cpython/3.7.7: ERROR: Package '298e77470aed65ffc0d06f5a94383d156ebefe8c' build failed
cpython/3.7.7: WARN: Build folder C:\J\c3ipr\pr_1510_20_4_46\.conan\data\cpython\3.7.7\_\_\build\298e77470aed65ffc0d06f5a94383d156ebefe8c
ERROR: cpython/3.7.7: Error in build() method, line 269
	self._msvc_build()
while calling '_msvc_build', line 263
	platforms=self._msvc_archs, properties=msbuild_properties)
	ConanException: Error 1 while executing call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC/vcvarsall.bat" amd64 && msbuild "source_subfolder\PCBuild\pythonw_uwp.vcxproj" /p:Configuration="Debug" /p:UseEnv=true /p:Platform="x64" /m:1 /p:PlatformToolset="v140" /verbosity:minimal /p:ForceImportBeforeCppTargets="C:\J\c3ipr\pr_1510_20_4_46\.conan\data\cpython\3.7.7\_\_\build\298e77470aed65ffc0d06f5a94383d156ebefe8c\conan_build.props" /p:IncludeExternals="true"