C:\Users\bhamiltoncx\src\buck\third-party\py\pywatchman>set VS90COMNTOOLS=%VS140COMNTOOLS%

C:\Users\bhamiltoncx\src\buck\third-party\py\pywatchman>python setup.py build
running build
running build_py
copying pywatchman\__init__.py -> build\lib.win-amd64-2.7\pywatchman
running build_ext
building 'pywatchman.bser' extension
C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\BIN\amd64\cl.exe /c /nologo /Ox /MD /W3 /GS- /DNDEBUG -Ic:\python27\include -Ic:\python27\PC /Tcpywatchman/bser.c /Fobuild\temp.win-amd64-2.7\Release\pywatchman/bser.obj
bser.c
c:\python27\include\pymath.h(22): warning C4273: 'round': inconsistent dll linkage
C:\Program Files (x86)\Windows Kits\10\include\10.0.10150.0\ucrt\math.h(521): note: see previous definition of 'round'
C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\BIN\amd64\link.exe /DLL /nologo /INCREMENTAL:NO /LIBPATH:c:\python27\libs /LIBPATH:c:\python27\PCbuild\amd64 /EXPORT:initbser build\temp.win-amd64-2.7\Release\pywatchman/bser.obj /OUT:build\lib.win-amd64-2.7\pywatchman\bser.pyd /IMPLIB:build\temp.win-amd64-2.7\Release\pywatchman\bser.lib /MANIFESTFILE:build\temp.win-amd64-2.7\Release\pywatchman\bser.pyd.manifest
bser.obj : warning LNK4197: export 'initbser' specified multiple times; using first specification
   Creating library build\temp.win-amd64-2.7\Release\pywatchman\bser.lib and object build\temp.win-amd64-2.7\Release\pywatchman\bser.exp
C:\Program Files (x86)\Windows Kits\8.1\bin\x64\mt.exe -nologo -manifest build\temp.win-amd64-2.7\Release\pywatchman\bser.pyd.manifest -outputresource:build\lib.win-amd64-2.7\pywatchman\bser.pyd;2

build\temp.win-amd64-2.7\Release\pywatchman\bser.pyd.manifest : general error c1010070: Failed to load and parse the manifest. The system cannot find the file specified.
error: command 'mt.exe' failed with exit status 31