dh_gnustep: command not found

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/dh_gnustep - from package: gnustep-make

You may install the required package with command apt-get install {package}

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