Artifacts to be built can be limited only to certain packages. This could be very helpful, in case you want to build an artifact of only one package or a few while testing locally.
// Limit build by certain packages
sfp build -v devhub --branch=main -p sales-ui,sales-channels
Limiting artifacts by ignoring packages
Packages can be ignored from the build command by utilising an additional descriptor on the package in project manifest (sfdx-project.json)