in kchmviewer-4.0beta3 tarball path to kchmviewer.desktop was changed from libs/kio-msits/kchmviewer.desktop to src/kde/kchmviewer.desktop new ebuild attached Reproducible: Always
Created attachment 171070 [details] kchmviewer ebuild
Thanks for submitting this fix, assigning to maintainers
Alexandr, thank you for report. Fixed in kchmviewer-4.0_beta3-r1.