Error building ubuntu-singularity: unable to locate package software-properties-common

[ignatiusm]

Thank you for this repo full of excellent resources :)

I am trying to build the ubuntu-singularity runner .sif file (as at commit 88b3787) using singularity 4.1.0 on Ubuntu.

When I run sudo singularity build github-actions-runner-singularity.sif github-actions-runner-singularity.def the build fails with the error: unable to locate package software-properties-common. I think the .def file needs an additional apt-get update -y before installing software-properties-common.