epm: check real file detection

bin/epm

@@ -297,7 +297,8 @@ check_option()
 check_filenames()
 {
     local opt="$1"
-    if [ -f "$opt" ] && echo $opt | grep -q "\." ; then
+    # files can be with full path or have extension via .
+    if [ -f "$opt" ] && echo "$opt" | grep -q "[/\.]" ; then
         pkg_files="$pkg_files $opt"
     else
         pkg_names="$pkg_names $opt"