It was renamed as kpackagetool6

Author: Montel

completions/plasmashell.zsh

@@ -12,7 +12,7 @@ function _plasma_list_packages() {
   # (@) array Expansion Flags are needed because we need to operate on each element separately.
   packages=( ${(f)"$(
     _call_program plasma-list-packages \
-      kpackagetool5 --type "$type" --list --global
+      kpackagetool6 --type "$type" --list --global
     )"} )
   # First line is an output header, it contains path where plugins are probed.
   global_dir="${${${packages[1]}##* in }%/}"

kcms/desktoptheme/kcm.cpp

@@ -132,7 +132,7 @@ void KCMDesktopTheme::installTheme(const QString &path)
 {
     qCDebug(KCM_DESKTOP_THEME) << "Installing ... " << path;
 
-    const QString program = QStringLiteral("kpackagetool5");
+    const QString program = QStringLiteral("kpackagetool6");
     const QStringList arguments = {QStringLiteral("--type"), QStringLiteral("Plasma/Theme"), QStringLiteral("--install"), path};
 
     qCDebug(KCM_DESKTOP_THEME) << program << arguments.join(QLatin1Char(' '));