Munipack modifies the backup strategy of FITS files. Both the Unix philosophy, as well as common FITS conventions, are modified.
$ mkdir work/ $ munipack phcorr ... -t work/ data/*.fitsBy default, the label _proc is included in filenames when the output directory, by -t switch, is not specified. This is common for phcorr, astrometry, find, aphot, gphot.
The backup strategy has been changed between versions 0.5.10 and 0.5.11 (January 2018), and revised in 0.5.13 (November 2020).