For the filing cabinet which is currently coming from:
/usr/share/icons/gnome/48x48/apps/system-file-manager.png
pushing a 'system-file-manager' icon to 'unity-asset-pool'/'unity-icon-theme' should cause it to be overridden when used by (just) Unity. Alternatively, we could patch 'nautilus.desktop' to point to another icon:
$ grep Icon /usr/share/applications/nautilus.desktop Icon=system-file-manager
or point to something other than 'nautilus.desktop'.
For the filing cabinet which is currently coming from:
/usr/ share/icons/ gnome/48x48/ apps/system- file-manager. png
pushing a 'system- file-manager' icon to 'unity- asset-pool' /'unity- icon-theme' should cause it to be overridden when used by (just) Unity. Alternatively, we could patch 'nautilus.desktop' to point to another icon:
$ grep Icon /usr/share/ applications/ nautilus. desktop system- file-manager
Icon=
or point to something other than 'nautilus.desktop'.