### Bug Description When building a `base: core24` snap with `snapcraft --ua-token <token>`, an error message is emitted: ``` Error: unrecognized arguments: --ua-token ``` No error is emitted when using the environment variable instead. No reference to Ubuntu Advantage, UA, or Pro exists in any of the help text options of snapcraft (that I have tried) in core24 projects, but is still visible in core22 projects. Indeed, several flags are missing for core24 projects, such as `--enable-experimental-plugins`. ### To Reproduce Install snapcraft 8.x (tested revisions 12000 and 12024) and attempt to build the provided `snapcraft.yaml` with and without `--ua-token <token>` or with `SNAPCRAFT_UA_TOKEN=<token>` set and unset. ### Environment Ubuntu 23.10, building with `--use-lxd`. ### snapcraft.yaml ```shell name: my-snap-name # you probably want to 'snapcraft register <name>' base: core22 # the base snap is the execution environment for this snap version: '0.1' # just for humans, typically '1.2+git' or '1.3.2' summary: Single-line elevator pitch for your amazing snap # 79 char long summary description: | This is my-snap's description. You have a paragraph or two to tell the most important story about your snap. Keep it under 100 words though, we live in tweetspace and your description wants to look good in the snap store. grade: devel # must be 'stable' to release into candidate/stable channels confinement: devmode # use 'strict' once you have the right plugs and slots parts: my-part: # See 'snapcraft plugins' plugin: nil ``` ### Relevant log output ```shell Building the aforementioned snap with `base: core22` yields: Attaching specified UA token... Attach UA token :: Enabling Ubuntu Pro: ESM Apps :: Ubuntu Pro: ESM Apps enabled :: Enabling Ubuntu Pro: ESM Infra :: Ubuntu Pro: ESM Infra enabled :: This machine is now attached to 'Ubuntu Pro - free personal subscription' :: :: SERVICE ENTITLED STATUS DESCRIPTION :: anbox-cloud yes disabled Scalable Android in the cloud :: esm-apps yes enabled Expanded Security Maintenance for Applications :: esm-infra yes enabled Expanded Security Maintenance for Infrastructure :: fips-preview yes disabled Preview of FIPS crypto packages undergoing certification with NIST :: fips-updates yes disabled FIPS compliant crypto packages with stable security updates :: usg yes disabled Security compliance and audit tools :: :: NOTICES :: Operation in progress: pro attach :: :: For a list of all Ubuntu Pro services, run 'pro status --all' :: Enable services with: pro enable <service> :: :: Account: dilyn.corner@canonical.com :: Subscription: Ubuntu Pro - free personal subscription No such output is observed with `base: core24` ``` ### Additional context `ubuntu-advantage-tools` is not installed in the container. Installing it and checking `pro status` yields: ``` snapcraft-gotop-on-amd64-for-amd64-131222 ../project# pro status SERVICE AVAILABLE DESCRIPTION anbox-cloud yes Scalable Android in the cloud esm-apps yes Expanded Security Maintenance for Applications esm-infra yes Expanded Security Maintenance for Infrastructure landscape yes Management and administration tool for Ubuntu livepatch yes Canonical Livepatch service realtime-kernel yes Ubuntu kernel with PREEMPT_RT patches integrated For a list of all Ubuntu Pro services, run 'pro status --all' This machine is not attached to an Ubuntu Pro subscription. See https://ubuntu.com/pro ```