### Bug Description Trying to build any charm using charmcraft 1.5, 2.0, 2.1, or 2.2 will result in an error when the build env is installing core20 and snapd: 2025-03-13 10:17:46.898 * Command standard error output: b'error: cannot perform the following tasks:\n- Ensure prerequisites for "charmcraft" are available (cannot install snap base "core20": snap "core20" assumes unsupported features: snapd2.61 (try to refresh snapd))\n' More details at: https://pastebin.ubuntu.com/p/95t7ZWMtCx/plain/ It can be easily reproduced by creating a bionic VM and running "sudo snap install core20". It will fail. The solution is to install snapd first, then installing core20 succeeds. If the charmcraft build script installed snapd prior to attempting to install core20, it would avoid the issue and address the inability to build older charms that are pinned to use older charmcraft versions. ### To Reproduce It can be easily reproduced by creating a bionic VM and running "sudo snap install core20". ### Environment charmcraft 1.5, 2.0, 2.1, or 2.2 ### charmcraft.yaml ```yaml not relevant ``` ### Relevant log output ```shell https://pastebin.ubuntu.com/p/95t7ZWMtCx/plain/ ```