Hello everyone in libksysguard Cmake : if(Qt5WebKitWidgets_FOUND) add_subdirectory( processui ) endif() On the other hand in workspace/plasma-workspace/systemmonitor/ksystemactivitydialog.h trying to include processui/ksysguardprocesslist.h even QTWebkit is an optional depency. Thus this makes whole plasma-workspace couldn't compile Reproducible: Always
This has been resolved at some point in the past; it now optionally uses QWebEngineWidgets. It always installs the UI parts and the header mentioned as missing here.