anchor.diff:  ECHO BOOST_INCLUDEDIR=%BOOST_INCLUDEDIR%, checking directory...
   IF EXIST %BOOST_ROOT% (ECHO boost OK) ELSE (EXIT /b)
   
  +IF %NIX_MX_ONLY% == "" (
   ECHO --------------------------------------------------------------------------
   ECHO Setting up nix build ...
   ECHO --------------------------------------------------------------------------
  
positive.code: REM nix-mx requires nixversion file in ../nix/include/nix
  IF EXIST %NIX_ROOT%\build\include\nix\nixversion.hpp (
  	COPY %NIX_ROOT%\build\include\nix\nixversion.hpp %NIX_ROOT%\include\nix\
  )
  
  ECHO --------------------------------------------------------------------------
  
negative.code: SET HDF5_VERSION_DIR=hdf5-1.10.1
  REM Static build requires cmake version 3.9.1
  SET CMAKEVER=3.9.1
  REM Leave NIX_MX_ONLY "" for full nix and nix-mx build
  SET NIX_MX_ONLY=""
  
  ECHO --------------------------------------------------------------------------
  ECHO Checking dependencies ...
  