### Check existing issues - [x] I've verified that this bug isn't described by any existing issues. ### Bug description Look at `/snap/mesa-2404/current/snap/manifest.yaml`: ``` $ cat /snap/mesa-2404/current/snap/manifest.yaml | yq '.parts[] | .stage-packages' | sort -u | wc -l 140 $ cat /snap/mesa-2404/current/snap/manifest.yaml | yq '.primed-stage-packages' | sort -u | wc -l 64 ``` Looking closer, the packages are listed without architecture. ### Steps to reproduce With the attached YAML: ``` $ SNAPCRAFT_BUILD_INFO=1 snapcraft --verbose $ unsquashfs base-cleanup_0.1_amd64.snap $ cat squashfs-root/snap/manifest.yaml | yq '.parts[] | .stage-packages' | sort -u - gcc-14-base:i386=14.2.0-4ubuntu2~24.04 - libc6:i386=2.39-0ubuntu8.6 - libgcc-s1:i386=14.2.0-4ubuntu2~24.04 - xz-utils=5.6.1+really5.4.5-1ubuntu0.2 $ cat squashfs-root/snap/manifest.yaml | yq '.primed-stage-packages' | sort -u - gcc-14-base=14.2.0-4ubuntu2~24.04 - libc6=2.39-0ubuntu8.6 - libgcc-s1=14.2.0-4ubuntu2~24.04 - xz-utils=5.6.1+really5.4.5-1ubuntu0.2 ``` ### Environment Ubuntu 25.10 Snapcraft 8.13.2 ### snapcraft.yaml ```yaml name: base-cleanup base: core24 version: '0.1' summary: Cleanup verifier description: Cleanup verifier grade: devel confinement: devmode package-repositories: - type: apt url: http://archive.ubuntu.com/ubuntu suites: [noble] components: [main] architectures: [i386] key-id: F6ECB3762474EDA9D21B7022871920D1991BC93C key-server: keyserver.ubuntu.com parts: my-part: plugin: nil stage-packages: - xz-utils - xz-utils:i386 ``` ### Log output ```shell <!-- Provide any relevant logging. This field automatically renders as a log, so you don't need to add special formatting. --> ```