add a %pre "hack" that removes the existing bindir/alex before %ghost kicks in

this prevents the old binary being left as a ghost preventing
the alternative symlink from being made when upgrading from
the pre-alternatives packaging

alex.spec

@@ -99,6 +99,14 @@ rm %{buildroot}%{_pkgdocdir}/LICENSE
 
 
 %if %{with static}
+%pre
+if [ $1 -eq 2 ] ; then
+  if [ -f %{_bindir}/%{name} -a ! -L %{_bindir}/%{name} ]; then
+      rm %{_bindir}/%{name}
+  fi
+fi
+
+
 %post
 %{_sbindir}/update-alternatives --install %{_bindir}/%{name} \
   %{name} %{_bindir}/%{name}.dynamic 70
@@ -149,6 +157,7 @@ fi
 * Sun Aug  3 2014 Jens Petersen <petersen@redhat.com> - 3.1.3-1
 - update to 3.1.3
 - add static and common subpackages
+- dynamic and static are handled as alternatives
 
 * Tue Jun 10 2014 Jens Petersen <petersen@redhat.com> - 3.0.5-37
 - update to cblrpm-0.8.11