# Build Utility Environment Variables

The values of the following environment variables can be set in the build environment window. For an overview of how these environment variables are used, see Using Macros and Environment Variables.

The following environment variables are automatically set through the SetEnv.bat file when the build environment is created:

_BUILDARCH

BASEDIR

BUILD_ALT_DIR

BUILD_DEFAULT

BUILD_DEFAULT_TARGETS

BUILD_MAKE_PROGRAM

BUILD_MULTIPROCESSOR

DDK_TARGET_OS

DDKBUILDENV

DEPRECATE_DDK_FUNCTIONS

NO_BINPLACE

NO_BROWSER_FILE

NTDEBUG

The following environment variables are not automatically set by using the SetEnv.bat file when the build environment is created, but can be created by using the set command:

AMD64_FLAGS

BINPLACE_LOG

BUILD_OPTIONS

CHECKED_ALT_DIR

PREFAST_ROOT