Check the root filesystem instead of the destdir

src/lib/network/clients/save_network.rb

@@ -37,16 +37,14 @@ def adjust_for_network_disks(file)
       # storage-ng
       # Check if installation is targeted to a remote destination.
       devicegraph = Y2Storage::StorageManager.instance.staging
-      is_disk_in_network = devicegraph.filesystem_in_network?(
-        Installation.destdir
-      )
+      is_disk_in_network = devicegraph.filesystem_in_network?("/")
 
       if !is_disk_in_network
-        log.info("Directory \"#{Installation.destdir}\" is not on a network based device")
+        log.info("Root filesystem is not on a network based device")
         return
       end
 
-      log.info("Directory \"#{Installation.destdir}\" is on a network based device")
+      log.info("Root filesystem is on a network based device")
 
       # tune ifcfg file for remote filesystem
       SCR.Execute(

test/save_network_test.rb

@@ -22,13 +22,13 @@
       Y2Storage::StorageManager.create_test_instance
 
       staging = Y2Storage::StorageManager.instance.staging
-      allow(staging).to receive(:filesystem_in_network?).and_return(in_network)
+      allow(staging).to receive(:filesystem_in_network?).with("/").and_return(in_network)
       allow(subject).to receive(:save_network)
       # Mainly for import
       subject.main
     end
 
-    context "when installation directory is in a network device" do
+    context "when the root filesystem of the target system is in a network device" do
       let(:in_network) { true }
 
       it "tunes ifcfg file for remote filesystem" do
@@ -38,7 +38,7 @@
       end
     end
 
-    context "when installation directory is in a local device" do
+    context "when the root filesystem of the target system is in a local device" do
       let(:in_network) { false }
 
       it "does not touch any configuration file" do