See here: https://github.com/m64p/m64p/runs/5806822304?check_suite_focus=true
Package fetch error: The item ‘/home/runner/.cache/snapcraft/download/libdrm-nouveau2_2.4.107-8ubuntu1~20.04.1_amd64.deb’ could not be fetched: 404 Not Found [IP: 52.154.174.208 80]
Works when using snapcraft v5