After some digging, I've found this answer: https://stackoverflow.com/questions/22464786/ignoring-bash-pipefail-for-error-code-141#comment60412687_33026977 Basically, using:
set -euxo pipefail
yes phrase | make installer || (ec=$? ; if [ "$ec" -eq 141 ]; then exit 0; else exit "$ec"; fi)
just filters out SIGPIPE from return codes.