epm install: do not remote temp. pkg if ran with DEBUG

bin/epm-install

@@ -733,9 +733,12 @@ epm_install()
     epm_install_files $files
     local RETVAL=$?
 
+    # TODO: move it to exit handler
+    if [ -z "$DEBUG" ] ; then
     # TODO: reinvent
     [ -n "$to_remove_pkg_files" ] && rm -fv $to_remove_pkg_files
     [ -n "$to_remove_pkg_files" ] && rmdir -v $(dirname $to_remove_pkg_files | head -n1) 2>/dev/null
+    fi
 
     return $RETVAL
 }