Cmake Error on windows10 build about openrv HOT 8 CLOSED

E:/projects/programming/OpenRV/cmake/macros/rv_stage.cmake(402):  IF(NOT EXISTS E:/projects/programming/OpenRV/src/plugins/rv-packages/additional_nodes/PACKAGE )
E:/projects/programming/OpenRV/cmake/macros/rv_stage.cmake(406):  EXECUTE_PROCESS(COMMAND bash -c cat PACKAGE | grep version: | grep --only-matching -e '[0-9.]*' RESULT_VARIABLE _result OUTPUT_VARIABLE _pkg_version OUTPUT_STRIP_TRAILING_WHITESPACE COMMAND_ERROR_IS_FATAL ANY WORKING_DIRECTORY E:/projects/programming/OpenRV/src/plugins/rv-packages/additional_nodes )
grep: unrecognized option: only-matching
BusyBox v1.29.3 (2019-01-24 07:45:07 UTC) multi-call binary.

Usage: grep [-HhnlLoqvsriwFE] [-m N] [-A/B/C N] PATTERN/-e PATTERN.../-f FILE [FILE]...

Search for PATTERN in FILEs (or stdin)
  -n      Add 'line_no:' prefix
  -l      Show only names of files that match
  -L      Show only names of files that don't match
  -c      Show only count of matching lines
  -o      Show only the matching part of line
  -q Quiet. Return 0 if PATTERN is found, 1 otherwise
  -v      Select non-matching lines
  -s      Suppress open and read errors
  -r      Recurse
  -i      Ignore case
  -w      Match whole words only
  -x      Match whole lines only
  -F      PATTERN is a literal (not regexp)
  -E      PATTERN is an extended regexp
  -m N    Match up to N times per file
  -A N    Print N lines of trailing context
  -B N    Print N lines of leading context
  -C N    Same as '-A N -B N'
                                                                                                                                                                                                                        -e PTRN Pattern to match
                                                                                                                                                                                                                                                        -f FILE Read pattern from file
          CMake Error at cmake/macros/rv_stage.cmake:406 (EXECUTE_PROCESS):
  EXECUTE_PROCESS failed command indexes:

    1: "Child return code: 2"

Call Stack (most recent call first):
  src/plugins/rv-packages/additional_nodes/CMakeLists.txt:11 (RV_STAGE)


-- Configuring incomplete, errors occurred!
See also "E:/projects/programming/OpenRV/cmake-build/CMakeFiles/CMakeOutput.log".