How can I use dir.exe flags within bash?

[eggbean]

I need to make an array of hidden files in bash (hidden as in the NTFS hidden flag, not preceding the a dot).

This doesn't work:

$ dir.exe /a:h /b "$dir"
dir: cannot access '/a:h': No such file or directory
dir: cannot access '/b': No such file or directory

This does work:

$ cmd.exe /C dir /a:h /b "$dir"
Default.rdp
desktop.ini
SideSync

But when I try using this in command substitution in bash...

for file in "$(cmd.exe /C dir /a:h /b "$dir")"; do STUFF; done

...it results in a series of errors that looks like this, as it's started in the directory where the script resides:

Cannot match pattern: '. ./src ./src/pathpicker ./S3 /mnt/c/Users/jason'
'\\wsl.localhost\WLinux\home\jason\.dotfiles\bin\scripts'
CMD.EXE was started with the above path as the current directory.
UNC paths are not supported.  Defaulting to Windows directory.
...

How can I make this work?

$ dir.exe /a:h /b "$dir"