### Bug Description In the LXD snap, we have some parts that are meant to be supported on some arches only. For example, we don't want to ship QEMU for `armhf` nor `riscv64`. As such, the `qemu` part is constructed to avoid installing the `build-packages` and the `stage-packages` when building for `armhf`/`riscv64`: ``` qemu: build-packages: - to armhf: - cmake # placeholder pkg (actually used by lxd part) to avoid installing build-packages on unsupported arches - to riscv64: - cmake # placeholder pkg (actually used by lxd part) to avoid installing build-packages on unsupported arches - else: - bison - ... - librbd-dev stage-packages: - to armhf: - acl # placeholder pkg (actually used by lxd part) to avoid installing stage-packages on unsupported arches - to riscv64: - acl # placeholder pkg (actually used by lxd part) to avoid installing stage-packages on unsupported arches - else: - genisoimage - ... - qemu-system-data # This is needed due to --disable-install-blobs. ... ``` However, only the last `- to $ARCH:` clause seems to be respected as on `armhf`, the builds on LP builders always fail complaining that `librbd-dev` is not available. `librbd-dev` is indeed not available for `armhf` which is the whole reason why we try to exclude it with the `- to`/`- else` clauses. The exclusion works for the `- to riscv64:` as neither `librbd-dev` nor `qemu-system-data` are found in the `riscv64` build logs. **important**: Inverting the `- to armhf:` and `- to riscv64:` made the `armhf` build work as it then stops trying to pull `librbd-dev` ### To Reproduce `snapcraft remote-build --platform amd64,armhf,riscv64` on a cloned repo from https://github.com/canonical/lxd-pkg-snap ### Environment ``` $ snap list snapcraft Name Version Rev Tracking Publisher Notes snapcraft 8.6.1 13459 latest/stable canonical✓ classic ``` ### snapcraft.yaml ```yaml https://github.com/canonical/lxd-pkg-snap/blob/f3327146996d52e66f8726a88766021f678e2575/snapcraft.yaml ``` ### Relevant log output ```shell Running pull phase... Initialising lifecycle Installing build-packages Cannot find package listed in 'build-packages': librbd-dev ``` ### Additional context _No response_