Fix regression: can't open folder via cammand argument #36

Job	Run time
before_build	23s
build_windows_cmake (Release, x64, amd64)	4m 10s
build_windows_msys2 (Release, x86_64)	5m 21s
build_windows (Release, x64)	3m 28s
build_windows_msys2 (Release, i686)	5m 10s
build_windows (Release, Win32)	4m 24s
build_windows_msys2 (Debug, x86_64)	5m 17s
build_windows (Release, ARM64)	4m 58s
build_windows_msys2 (Debug, i686)	4m 0s
build_windows (Debug, x64)	5m 44s
build_windows (Debug, Win32)	3m 41s
build_windows (Debug, ARM64)	3m 22s
	49m 58s

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