Import local issuer certificates to msys2

import.ps

get-childitem -path cert:\LocalMachine\Root | ForEach-Object {
	$hash = $_.GetCertHashString()
	$base64certificate = @"
-----BEGIN CERTIFICATE-----
$([Convert]::ToBase64String($_.export('Cert'), [System.Base64FormattingOptions]::InsertLineBreaks))
-----END CERTIFICATE-----

"@
	[System.IO.File]::AppendAllText("$home\windows.pem", $base64certificate)
}

For node:

export NODE_EXTRA_CA_CERTS="C:\\msys64\\usr\\ssl\\certs\\ca-bundle.crt"

You may need echo -e there to interpret the \n