Sync gmail using mbsync (isync) on debian linux using XOAUTH2

I am trying to sync my mails from gmail to my local mail server using mbsync . But i keep getting an error Error: SASL(-4): no mechanism available: No worthy mechs found Here is my .mbsyncrc file: #IMAP server you wish to copy mails from. IMAPAccount original Host imap.gmail.com User username@gmail.com AuthMechs XOAUTH2 Pass access_token_recieved_from_google UseIMAPS yes CertificateFile /etc/ssl/certs/ca-certificates.crt # The IMAP server you wish to copy mails to. IMAPAccount target Host local.mail.server.host User local_user Pass somepass AuthMechs LOGIN UseIMAPS yes CertificateFile /etc/ssl/certs/ca-certificates.crt # Link IMAP server to remote used below. Note Account is set to 'original' now -- we'll be set it to 'target' later! IMAPStore my-remote Account original # The local storage we'll be using. Note the trailing slash at the end of the Path! MaildirStore my-local Path ~/mail/ Inbox ~/mail/INBOX/ # This is where the magic happens. Note Sync is set to 'Pull' now -- we'll set it to 'Push' later! Channel my-channel Master :my-remote: Slave :my-local: Patterns * Create Both Sync Pull SyncState * system: Linux stretch 4.9.0-7-amd64 #1 SMP Debian 4.9.110-1 (2018-07-05) x86_64 GNU/Linux mbsync --version isync 1.2.1 looks like mbsync isn't recognizing XOAUTH2 for keyword AuthMechs. If i change the AuthMech type to LOGIN, i get an invalid credentials error. (makes sense, i put in an auth token in place of the password). Any ideas?