Currently, doing trivial modifications to the spack.yaml (seen most prominently in #5) require rebuilding parallelio, esmf and (therefore) access-om3-nuopc. This is a bit of a time sink since esmf can take upwards of 1/2 an hour.

See the following runs, in which nothing was changed relating to the above packages: https://github.com/ACCESS-NRI/ACCESS-OM3/actions/runs/10987685371/job/30502929361?pr=5#step:8:767, https://github.com/ACCESS-NRI/ACCESS-OM3/actions/runs/10985399681/job/30497188155#step:8:773.

Determine if the current spack.packages.*.require statements are not restrictive enough to prevent a rebuild - https://github.com/ACCESS-NRI/ACCESS-OM3/pull/5/files#diff-e8582e74fa156f4e5729a850e52b24f2fde2d815c2c9c360f88c4cf90db851abR10-R20

Or maybe it's another problem?