Windows SDK не найден при установке SpiderMonkey

Я следую этому руководству, чтобы установить SpiderMokey.

Я скачал и установил Visual Studio Community 2015, затем перезапустил.
Я скачал и установил пакет MozillaBuild.

Когда я иду c:\mozilla-buildи бегу start-shell-msvc2015.bat, он говорит

MozillaBuild Install Directory: C:\mozilla-build\ Visual C++ 2015 Directory: C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\  No Windows SDK found. Exiting.  Press any key to continue . . . 

Я ожидаю, что он найдет Windows SDK, который, как я предполагаю, я только что скачал с VS 2015, но это не так.

Что он ищет и как его получить?

EDIT2:

После установки Windows SDK 8.1 и повторной попытки я получаю эту ошибку:

Unable to call a suitable vcvars script. Exiting. 

Вот весь скрипт установки:

@ECHO OFF  SETLOCAL ENABLEEXTENSIONS ENABLEDELAYEDEXPANSION  REM Reset some env vars and set some others. SET CYGWIN= SET INCLUDE= SET LIB= IF NOT DEFINED MOZ_NO_RESET_PATH ( SET PATH=%SystemRoot%\System32;%SystemRoot%;%SystemRoot%\System32\Wbem )  REM mintty is available as an alternate terminal, but is not enabled by default due REM to various usability regressions. Set USE_MINTTY to 1 to enable it. IF NOT DEFINED USE_MINTTY ( SET USE_MINTTY= )  SET ERROR= SET MOZILLABUILD=%~dp0 SET TOOLCHAIN=  REM Figure out if we're on a 32-bit or 64-bit host OS. REM NOTE: Use IF ERRORLEVEL X to check if the last ERRORLEVEL was GEQ(greater or equal than) X. SET WINCURVERKEY=HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion REG QUERY "%WINCURVERKEY%" /v "ProgramFilesDir (x86)" >nul 2>nul IF NOT ERRORLEVEL 1 ( SET WIN64=1 ) ELSE ( REM Bail early if the x64 MSVC start script is invoked on a 32-bit host OS. REM Note: We explicitly aren't supporting x86->x64 cross-compiles. IF "%MOZ_MSVCBITS%" == "64" ( SET ERROR=The MSVC 64-bit toolchain is not supported on a 32-bit host OS. Exiting. GOTO _QUIT ) SET WIN64=0 )  REM Append moztools to PATH IF "%WIN64%" == "1" ( SET MOZ_TOOLS=%MOZILLABUILD%moztools-x64 ) ELSE ( SET MOZ_TOOLS=%MOZILLABUILD%moztools ) SET PATH=%PATH%;%MOZ_TOOLS%\bin  REM Set up the MSVC environment if called from one of the start-shell-msvc batch files. IF DEFINED MOZ_MSVCVERSION ( IF NOT DEFINED VCDIR ( REM Set the MSVC registry key. IF "%WIN64%" == "1" ( SET MSVCKEY=HKLM\SOFTWARE\Wow6432Node\Microsoft\VisualStudio\%MOZ_MSVCVERSION%.0\Setup\VC ) ELSE ( SET MSVCKEY=HKLM\SOFTWARE\Microsoft\VisualStudio\%MOZ_MSVCVERSION%.0\Setup\VC )  REM Find the MSVC installation directory and bail if none is found. REG QUERY !MSVCKEY! /v ProductDir >nul 2>nul IF ERRORLEVEL 1 ( SET ERROR=Microsoft Visual C++ %MOZ_MSVCYEAR% was not found. Exiting. GOTO _QUIT ) FOR /F "tokens=2*" %%A IN ('REG QUERY !MSVCKEY! /v ProductDir') DO SET VCDIR=%%B )  IF NOT DEFINED SDKDIR ( REM Set the Windows SDK registry keys. SET SDKPRODUCTKEY=HKLM\SOFTWARE\Microsoft\Windows Kits\Installed Products SET SDKROOTKEY=HKLM\SOFTWARE\Microsoft\Windows Kits\Installed Roots IF "%WIN64%" == "1" ( SET WIN81SDKKEY= ) ELSE ( SET WIN81SDKKEY= )  REM Windows SDK 8.1 REG QUERY "!SDKPRODUCTKEY!" /v "!WIN81SDKKEY!" >nul 2>nul IF NOT ERRORLEVEL 1 ( FOR /F "tokens=2*" %%A IN ('REG QUERY "!SDKROOTKEY!" /v KitsRoot81') DO ( REM The Installed Products key still exists even if the SDK is uninstalled. REM Verify that the Windows.h header exists to confirm that the SDK is installed. IF EXIST "%%B\Include\um\Windows.h" ( SET SDKDIR=%%B ) )  REM Bail if no Windows SDK is found. IF NOT DEFINED SDKDIR ( SET ERROR=No Windows SDK found. Exiting. GOTO _QUIT )  SET SDKVER=8 SET SDKMINORVER=1 ) )  REM Prepend MSVC paths. IF "%MOZ_MSVCBITS%" == "32" ( REM Prefer cross-compiling 32-bit builds using the 64-bit toolchain if able to do so. IF "%WIN64%" == "1" IF EXIST "!VCDIR!\bin\amd64_x86\vcvarsamd64_x86.bat" ( CALL "!VCDIR!\bin\amd64_x86\vcvarsamd64_x86.bat" SET TOOLCHAIN=64-bit cross-compile )  REM LIB will be defined if vcvarsamd64_x86.bat has already run. REM Fall back to vcvars32.bat if it hasn't. IF NOT DEFINED LIB ( IF EXIST "!VCDIR!\bin\vcvars32.bat" ( CALL "!VCDIR!\bin\vcvars32.bat" SET TOOLCHAIN=32-bit ) ) ) ELSE IF "%MOZ_MSVCBITS%" == "64" ( IF EXIST "!VCDIR!\bin\amd64\vcvars64.bat" ( CALL "!VCDIR!\bin\amd64\vcvars64.bat" SET TOOLCHAIN=64-bit ) )  REM LIB will be defined if a vcvars script has run. Bail if it isn't. IF NOT DEFINED LIB ( SET ERROR=Unable to call a suitable vcvars script. Exiting. GOTO _QUIT ) )  cd "%USERPROFILE%" IF "%USE_MINTTY%" == "1" ( START %MOZILLABUILD%msys\bin\mintty -e %MOZILLABUILD%msys\bin\console %MOZILLABUILD%msys\bin\bash --login ) ELSE ( %MOZILLABUILD%msys\bin\bash --login -i ) EXIT /B  :_QUIT ECHO MozillaBuild Install Directory: %MOZILLABUILD% IF DEFINED VCDIR (ECHO Visual C++ %MOZ_MSVCYEAR% Directory: !VCDIR!) IF DEFINED SDKDIR (ECHO Windows SDK Directory: !SDKDIR!) IF DEFINED TOOLCHAIN (ECHO Trying to use the MSVC %MOZ_MSVCYEAR% !TOOLCHAIN! toolchain.) ECHO. ECHO %ERROR% ECHO. PAUSE EXIT /B