dh_girepository: 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_girepository - from package: gobject-introspection

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

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