diff --git a/SRPMS/virtualbox-extension-pack/virtualbox-extension-pack.spec.in b/SRPMS/virtualbox-extension-pack/virtualbox-extension-pack.spec.in
index b86d4f9..8725ede 100644
--- a/SRPMS/virtualbox-extension-pack/virtualbox-extension-pack.spec.in
+++ b/SRPMS/virtualbox-extension-pack/virtualbox-extension-pack.spec.in
@@ -40,7 +40,7 @@ wget -nv --timeout=10 --tries=2 \
 declare -A SRPMVERSION SRPMRELEASE
 . /etc/sysconfig/@sysconfigfile@
 
-install -D -m0644 ${VIRTUALBOX_EXTENSION_PACK_PCK} %{buildroot}/opt/VirtualBox/extension/${VIRTUALBOX_EXTENSION_PACK_PCK}
+install -D -m0644 ${VIRTUALBOX_EXTENSION_PACK_PCK} %{buildroot}%{_libdir}/VirtualBox/extension/${VIRTUALBOX_EXTENSION_PACK_PCK}
 cp %{S:0} LICENSE
 
 %clean
@@ -48,13 +48,13 @@ cp %{S:0} LICENSE
 
 %post
 #VBoxManage extpack uninstall Oracle_VM_VirtualBox_Extension_Pack || true
-VBoxManage extpack install /opt/VirtualBox/extension/Oracle_VM_VirtualBox_Extension_Pack-%{pck_majver}%{?pck_minver:%pck_minver}.vbox-extpack --replace
+VBoxManage extpack install %{_libdir}/VirtualBox/extension/Oracle_VM_VirtualBox_Extension_Pack-%{pck_majver}%{?pck_minver:%pck_minver}.vbox-extpack --replace
 # not working
 :
 
 %files
 %defattr(-,root,root)
-/opt/VirtualBox/extension/Oracle_VM_VirtualBox_Extension_Pack-%{pck_majver}%{?pck_minver:%pck_minver}.vbox-extpack
+%{_libdir}/VirtualBox/extension/Oracle_VM_VirtualBox_Extension_Pack-%{pck_majver}%{?pck_minver:%pck_minver}.vbox-extpack
 %doc LICENSE
 
 %changelog
diff --git a/SRPMSVERSIONS b/SRPMSVERSIONS
index 8a870ad..6d60a6a 100644
--- a/SRPMSVERSIONS
+++ b/SRPMSVERSIONS
@@ -17,7 +17,7 @@ SRPMRELEASE["spotify"]=1mamba
 SRPMVERSION["sun-java7"]="`curl -s http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html|grep "Linux x86.*i586.tar.gz"|tail -n1|sed "s|.*/java/jdk/\(.*\)/jdk-.*|\1|;s|-|_|" 2>/dev/null`"
 SRPMRELEASE["sun-java7"]=1mamba
 # virtualbox-extension-pack
-SRPMVERSION["virtualbox-extension-pack"]=4.3.20
+SRPMVERSION["virtualbox-extension-pack"]="`rpm -q VirtualBox 2>/dev/null| cut -d- -f2`"
 SRPMRELEASE["virtualbox-extension-pack"]=1mamba
 # win32codecs
 SRPMVERSION["win32codecs"]=20110131