The umbrel-dev CLI is now deprecated. To virtualize a local Umbrel instance for development we recommend using Multipass.
Once Multipass is installed you can run an Umbrel VM with:
multipass launch --name umbrel-dev --disk 10G
multipass exec umbrel-dev -- sh -c 'curl -L https://umbrel.sh | bash'
You can get an interactive shell inside the VM with:
multipass shell umbrel-dev