fix libexec dir properly

relatively speaking, arguably %%cmake_kf5 should be fixed (too)

polkit-kde.spec

@@ -3,7 +3,7 @@
 Name:    polkit-kde
 Summary: PolicyKit integration for KDE Desktop
 Version: 5.20.90
-Release: 2%{?dist}
+Release: 3%{?dist}
 
 License: GPLv2+
 URL:     https://invent.kde.org/plasma/%{base_name}
@@ -56,7 +56,8 @@ Provides Policy Kit Authentication Agent that nicely fits to KDE.
 
 
 %build
-%cmake_kf5
+%cmake_kf5 \
+  -DKDE_INSTALL_LIBEXECDIR:PATH=%{_kf5_libexecdir}
 
 %cmake_build
 
@@ -65,12 +66,6 @@ Provides Policy Kit Authentication Agent that nicely fits to KDE.
 
 %find_lang polkit-kde-authentication-agent-1
 
-# Move the agent from libexec to libexec/kf5
-sed -i "s/Exec=\/usr\/libexec\//Exec=\/usr\/libexec\/kf5\//" %{buildroot}%{_sysconfdir}/xdg/autostart/polkit-kde-authentication-agent-1.desktop
-mkdir -p %{buildroot}/%{_kf5_libexecdir}/
-mv %{buildroot}/%{_libexecdir}/polkit-kde-authentication-agent-1 \
-   %{buildroot}/%{_kf5_libexecdir}
-
 
 %files -f polkit-kde-authentication-agent-1.lang
 %license COPYING
@@ -82,6 +77,9 @@ mv %{buildroot}/%{_libexecdir}/polkit-kde-authentication-agent-1 \
 
 
 %changelog
+* Mon Jan 25 2021 Rex Dieter <rdieter@fedoraproject.org> - 5.20.90-3
+- fix libexec dir properly
+
 * Mon Jan 25 2021 Rex Dieter <rdieter@fedoraproject.org> - 5.20.90-2
 - fix BusName (kde#431963)
 - .spec cosmetics