+ ((eq exit-status 20)
+ (notmuch-pop-up-error "Error: Version mismatch.
+Emacs requested an older output format than supported by the notmuch CLI.
+You may need to restart Emacs or upgrade your notmuch Emacs package.")
+ (error "notmuch CLI version mismatch"))
+ ((eq exit-status 21)
+ (notmuch-pop-up-error "Error: Version mismatch.
+Emacs requested a newer output format than supported by the notmuch CLI.
+You may need to restart Emacs or upgrade your notmuch package.")
+ (error "notmuch CLI version mismatch"))