`pkgctl version bump` with unconventional pkgver

Hello, I've started experimenting with `pkgctl` for package maintainance. I am currently using it for a local copy of the AUR package "ampcode". I set up the nvchecker file to be: --- [ampcode] source = "npm" npm = "@sourcegraph/amp" from_pattern = '([0-9.]+)-([a-z0-9]+)' to_pattern = '\1+\2' --- And my pkgver is: pkgver="0.0.1762617680+gaa03ea" However, `pkgctl version upgrade` reports: ==> ERROR: Non-standard pkgver declaration What am I doing wrong? Bests, -- Giovanni Santini