deb file incorrectly matching to ar

[pdinfinera]

I have a deb file and after running the following code I get kind.Extension is ar instead of deb

buf, _ := ioutil.ReadFile("foo.deb")
kind, _ filetype.Match(buf)
fmt.Print(kind.Extension)
fmt.Print(kind.MIME.Value)

Output

ar
application/x-unix-archive

On other tries, I see the following output

deb
application/vnd.debian.binary-package

I'm guessing that it's due to arMagic and debMagic sharing the same first 7 bytes and that the ar matcher is sometimes running before deb matcher. Since arMagic and debMagic are added to a map, there's no guarantee as to the order when they get registered.

[bokunodev]

deb format is ar with some debian package manifest files included in it.