hjsmin: 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/hjsmin - from package: libghc-hjsmin-dev

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