diff --git a/gnome-shell-extension-sustmi.spec b/gnome-shell-extension-sustmi.spec
index 526ecdb..67730b3 100644
--- a/gnome-shell-extension-sustmi.spec
+++ b/gnome-shell-extension-sustmi.spec
@@ -93,7 +93,7 @@ Alt-F2, type `r`, and hit enter), or log out and log back in.
 # Install windowoverlay-icons.
 mkdir -p %{buildroot}/%{_datadir}/gnome-shell/extensions/%{UUID_WindowOverlay}
 mkdir -p %{buildroot}/%{_datadir}/glib-2.0/schemas/
-cp --archive --recursive  windowoverlay-icons/*  \
+cp --recursive --preserve=mode,timestamps  windowoverlay-icons/*  \
   %{buildroot}/%{_datadir}/gnome-shell/extensions/%{UUID_WindowOverlay}/
 # Move gschemas to the system directory.
 mv  %{buildroot}/%{_datadir}/gnome-shell/extensions/%{UUID_WindowOverlay}/schemas/org.gnome.shell.extensions.windowoverlay-icons.gschema.xml  \
@@ -102,7 +102,7 @@ rm --recursive %{buildroot}/%{_datadir}/gnome-shell/extensions/%{UUID_WindowOver
 
 # Install historymanager-prefix-search.
 mkdir -p %{buildroot}/%{_datadir}/gnome-shell/extensions/%{UUID_HistoryManager}
-cp --archive --recursive  historymanager-prefix-search/*  \
+cp --recursive --preserve=mode,timestamps  historymanager-prefix-search/*  \
   %{buildroot}/%{_datadir}/gnome-shell/extensions/%{UUID_HistoryManager}/
 # historymanager doesn't have any schemas (for now?).