origin patch from nixos.

see https://github.com/NixOS/nixpkgs/blob/2457551a54ffbd93b7d8f84af8b8fb3aac5cbdd5/pkgs/desktops/plasma-5/kwin/0001-NixOS-Unwrap-executable-name-for-.desktop-search.patch

---
 src/guix_utils.h     | 41 +++++++++++++++++++++++++++++++++++++++++
 src/service_utils.h   |  4 +++-
 src/waylandwindow.cpp |  5 ++++-
 3 files changed, 48 insertions(+), 2 deletions(-)
 create mode 100644 src/guix_utils.h

diff a/src/guix_utils.h b/src/guix_utils.h
new file mode 100644
index 0000000..726065d
--- /dev/null
+++ b/src/guix_utils.h
@@ -0,0 +1,23 @@
+#ifndef GUIX_UTILS_H
+#define GUIX_UTILS_H
+
+// kwin
+
+namespace KWin
+{
+
+static QString unwrapExecutablePath(const QString &in_executablePath)
+{
+    QString executablePath(in_executablePath);
+
+    while (executablePath.endsWith("-real") && executablePath[executablePath.lastIndexOf("/")+1] == QChar('.')) {
+        executablePath.remove(executablePath.length() - 5, 5);
+        executablePath.remove(executablePath.lastIndexOf("/")+1, 1);
+    }
+
+    return executablePath;
+}
+
+}// namespace
+
+#endif // GUIX_UTILS_H
diff a/src/utils/serviceutils.h b/src/utils/serviceutils.h
index 8a70c1f..475b15d 100644
--- a/src/utils/serviceutils.h
+++ b/src/utils/serviceutils.h
@@ -19,6 +19,7 @@
 #include <QLoggingCategory>
 //KF
 #include <KApplicationTrader>
+#include "guix_utils.h"
 
 namespace KWin
 {
@@ -26,8 +27,9 @@ namespace KWin
 const static QString s_waylandInterfaceName = QStringLiteral("X-KDE-Wayland-Interfaces");
 const static QString s_dbusRestrictedInterfaceName = QStringLiteral("X-KDE-DBUS-Restricted-Interfaces");
 
-static QStringList fetchProcessServiceField(const QString &executablePath, const QString &fieldName)
+static QStringList fetchProcessServiceField(const QString &in_executablePath, const QString &fieldName)
 {
+    const QString executablePath = unwrapExecutablePath(in_executablePath);
     // needed to be able to use the logging category in a header static function
     static QLoggingCategory KWIN_UTILS ("KWIN_UTILS", QtWarningMsg);
     const auto servicesFound = KApplicationTrader::query([&executablePath] (const KService::Ptr &service) {
diff a/src/waylandwindow.cpp b/src/waylandwindow.cpp
index fd2c0c1..ae8cf96 100644
--- a/src/waylandwindow.cpp
+++ b/src/waylandwindow.cpp
@@ -10,6 +10,7 @@
 #include "screens.h"
 #include "wayland_server.h"
 #include "workspace.h"
+#include "guix_utils.h"
 
 #include <KWaylandServer/display.h>
 #include <KWaylandServer/clientbuffer.h>
@@ -173,7 +174,9 @@ void WaylandWindow::updateIcon()
 
 void WaylandWindow::updateResourceName()
 {
-    const QFileInfo fileInfo(surface()->client()->executablePath());
+    const QString in_path = surface()->client()->executablePath();
+    const QString path = unwrapExecutablePath(in_path);
+    const QFileInfo fileInfo(path);
     if (fileInfo.exists()) {
         const QByteArray executableFileName = fileInfo.fileName().toUtf8();
         setResourceClass(executableFileName, executableFileName);
-- 
2.32.0