error with manually installing pre-downloaded deken package

[umlaeute]

yesterday i downloaded a package Gem(Darwin-amd64-32)(Darwin-amd64-64)(Darwin-arm64-32)(Darwin-arm64-64).dek
today i downloaded an updated version of the same file, that ended up as Gem(Darwin-amd64-32)(Darwin-amd64-64)(Darwin-arm64-32)(Darwin-arm64-64)-2.dek on my disk.

Trying to install the latter resulted in an error popup:

now i guess the problem is, that the -2 suffix (before the extension), renders the filename an invalid deken filename, so the regex fails and consequently there's no optionstring variable:

deken/deken-plugin.tcl

Lines 731 to 732 in ca7e26e

	regexp {^([^\[\]\(\)]+)((\[[^\[\]\(\)]+\])*)((\([^\[\]\(\)]+\))*)\.dek$} $filename _ pkgname optionstring _ archstring
	foreach {o _} [lreplace [split $optionstring {[]}] 0 0] {

i think, this could be handled better: either by relaxing the parsing constraints (and allowing a -2 infix, at least for local files), or by providing a better error message.