unpack .iso via bsdtar rather than mounting it

image.spec.in

@@ -1,5 +1,3 @@
-# needsrootforbuild
-
 Url:            http://www.suse.com/cloud
 Name:           __NAME__
 Summary:        %containment_image_description product .iso
@@ -11,7 +9,7 @@ Source:         __SOURCE__
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 BuildArch:      noarch
 BuildRequires:  containment-rpm-config
-%define temp_mnt /mnt/iso
+BuildRequires:  bsdtar
 
 %description
 This package installs the unpacked %containment_image_description product .iso into:
@@ -23,17 +21,15 @@ It is intended to be installed on the SUSE Cloud admin server.
 %prep
 
 %build
-mkdir -p %temp_mnt
-mount %{S:0} %temp_mnt
+
+bsdtar xf %{S:0}
 
 
 %install
 install -d -m 755 $RPM_BUILD_ROOT%containment_image_dest_dir
-cp -pr %temp_mnt/* $RPM_BUILD_ROOT%containment_image_dest_dir
+cp -pr * $RPM_BUILD_ROOT%containment_image_dest_dir
 install -d -m 755 %{_rpmdir}/OTHER
 cp -pr %{S:0} %{_rpmdir}/OTHER
-umount %temp_mnt
-
 %files
 %defattr(-, root, root)
 %containment_extra_files