+1m doesn't work on Ubuntu 24.04 (GNU findutils version 4.9.0)

On sourcing the setup script:

find: invalid argument `+1m' to `-mtime'
find: invalid argument `+15d' to `-mtime'

added changepatch statusto do typesoftware labels

assigned to @paconnor

added DasAnalysisSystem#3 as parent epic

Note: in fact, even the logic fails on macOS...