There is a new pull request by ahesford against master on the void-packages repository https://github.com/ahesford/void-packages qwt-qt6 https://github.com/void-linux/void-packages/pull/46911 qwt: add qt6 packages Qwt can be built with Qt5 or Qt6. Unfortunately, `gnuradio` remains wed to Qt5, so we still need a Qt5 version. The other dependant, `linssid`, can be built with Qt6 with a trivial patch. For now, we can install `qwt` for both Qt5 and Qt6, and we can drop the `-qt6` packages when the Qt5 variant becomes obsolete. #### Testing the changes - I tested the changes in this PR: **yes** (`linssid` launches, locally built software that uses qwt works fine for Qt5 and Qt6) A patch file from https://github.com/void-linux/void-packages/pull/46911.patch is attached