Trying to rebuild a `base: core20` snap using `plugin: meson`, I now get: ``` $ snapcraft --debug Launching a VM. cSkipping pull anon-shm-preload (already ran) Skipping pull fonts (already ran) Skipping pull libfeedback (already ran) Skipping pull recipe-version (already ran) Skipping pull squeekboard-patches (already ran) Skipping pull squeekboard (already ran) 'gtk-prep' has dependencies that need to be staged: squeekboard Skipping pull squeekboard (already ran) Building squeekboard + snapcraftctl build + /usr/bin/python3 -m pip install -U meson Requirement already up-to-date: meson in /usr/local/lib/python3.8/dist-packages (1.5.1) + '[' '!' -f build.ninja ']' + meson --prefix /usr -Dstrict=false -Dbuildtype=release /root/parts/squeekboard/src/ The Meson build system Version: 1.5.1 Source dir: /root/parts/squeekboard/src Build dir: /root/parts/squeekboard/build Build type: native build ../src/meson.build:1:0: ERROR: Could not find an implementation of tomllib, nor toml2json ``` Meson 1.5.0 added a dependency on TOML parsing to support Cargo.toml: https://mesonbuild.com/Release-notes-for-1-5-0.html There are a couple possible workarounds: - `python3 -m pip -U install tomli` before `snapcraftctl build` - set `meson-version: 1.4.2` for the part