AMDiS also needs debian update :)

AMDiS/postrm.in

 #!/bin/sh
+if "$1" = "upgrade" ; then 
+  exit 0
+fi
 NEWDIRS_SEMI="@deb_add_dirs@"
 NEWDIRS=`echo ${NEWDIRS_SEMI} | sed 's/;/ /g'`
 BASEDIR=@CPACK_INSTALL_PREFIX@
 #echo "will create the remove directories:"
 for d in ${NEWDIRS}; do
 #  echo "${BASEDIR}${d}"
-   rm -rf ${BASEDIR}${d}
+   rm -r ${BASEDIR}${d} > /dev/null 2> /dev/null
 done
-
+exit 0