NMU Policy NMUs should be made to assist a package's maintainer in closing bugs. They should only be to fix bugs that have been filed in the BTS for at least a week, and generally only when the proposed fix has been sent to the maintainer long enough to be considered. For NMUs on actively maintained packages, or that fix recently filed bugs or bugs with severity normal or below, the maintainer should be contacted with the patch before the NMU is uploaded, and given enough time (usually a few days) to upload a fix, give some indication when a fix will be uploaded, or tell the NMUer to go ahead. NMUs should be versioned so that the next maintainer upload will overwrite them (ie, by bumping the Debian revision by 0.1); and the unified diff (diff -ur) between the last maintainer upload (or the last NMU) should be sent to the BTS. The NMUer should monitor the package's bug page for the next week to ensure that the NMU didn't introduce any new bugs. If any new bugs were introduced, it's the NMUer's responsibility to fix them. NMUers should check the maintainer's entry on db.debian.org for any additional notes about the maintainer's availability.