+ # give bundle (almost) all the cores. See also the MAKE env var that is passed into the
+ # docker run command below.
+ # Cf. https://build.betterup.com/one-weird-trick-that-will-speed-up-your-bundle-install/
+ tmpfile=$(mktemp /tmp/run-build-packages-one-target.XXXXXX)
+ cores=$(let a=$(grep -c processor /proc/cpuinfo )-1; echo $a)
+ printf -- "---\nBUNDLE_JOBS: \"$cores\"" > $tmpfile