anchor.diff:  @echo off
  +@echo [boost] begin
   if "%1"=="" goto default_value_python:
   if "%1"=="default" goto default_value_python:
   set pythonexe=%1
  
positive.code: set version=1_64_0
  set version2=1.64.0
  if exist %current%boost\boost_%version% goto booststrap:
  @echo Download boost
  bitsadmin /transfer wcb /priority high https://dl.bintray.com/boostorg/release/%version2%/source/boost_%version%.7z %current%boost\boost_%version%.7z
  set PATH=%PATH%;C:\Program Files\7-Zip\
  @echo Unzip xgboost
  7z x %current%boost\boost_%version%.7z -o%current%boost\boost_%version%
  
  :booststrap:
  @echo BOOTSTRAP ---------------------
  cd %current%boost\boost_%version%\boost_%version%\tools\build
  rem cmd /c bootstrap
  
  :b2:
  @echo B2 ---------------------
  rem cmd /c b2 install --prefix=%current%boost\MYINST
  
  :python-config:
  @echo [config]
  rem @echo "using python : 3.6;" >> boost\MYINST\share\boost-build\example\user-config.jam
  
  :build:
  @echo [build]
  set PATH=%PATH%;%current%boost\MYINST\bin
  cd %current%boost\boost_%version%\boost_%version%
  b2 --build-dir=%current%boost\build toolset=msvc --with-python --build-type=complete architecture=x86 address-model=64 runtime-link=static msvc stage
  
negative.code: 
  :start_script:
  set current=%~dp0
  
  @echo [boost] vcvarsall.bat
  pushd "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC"
  call vcvarsall.bat x64
  popd
  @echo [boost] vcvarsall.bat Done
  
  @echo [boost] mkdir
  set PATH=%pythonexe%;%pythonexe%\Scripts;%PATH%
  if not exist boost mkdir boost
  pushd boost
  