screenlets-packager: command not found

Have You tried accessing the binary with the full path?

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/screenlets-packager - from package: screenlets

You may install the required package with command apt-get install {package}
Error in other languages:
screenlets-packager: bevel nie gevind nie
screenlets-packager: comandă negăsită
screenlets-packager: comando não encontrado
screenlets-packager: commande introuvable
screenlets-packager: command not found
screenlets-packager: käsku ei ole
screenlets-packager: không tìm thấy lệnh
screenlets-packager: komanda nerasta
screenlets-packager: Kommando nicht gefunden.
screenlets-packager: kommandot finns inte
screenlets-packager: komut yok
screenlets-packager: nie znaleziono polecenia
screenlets-packager: níor aimsíodh an t-ordú
screenlets-packager: no se encontró la orden
screenlets-packager: no s'ha trobat l'ordre
screenlets-packager: opdracht niet gevonden
screenlets-packager: parancs nem található
screenlets-packager: perintah tidak ditemukan
screenlets-packager: príkaz nenájdený
screenlets-packager: příkaz nenalezen
screenlets-packager: команда не найдена
screenlets-packager: командата не е открита
screenlets-packager: 命令找不到
screenlets-packager: コマンドが見つかりません