diff --git a/conf/systemd.service b/conf/systemd.service
index f7e76b2..21eff83 100644
--- a/conf/systemd.service
+++ b/conf/systemd.service
@@ -6,6 +6,7 @@ After=network.target
 Type=simple
 User=__APP__
 Group=__APP__
+Environment="PYTHONHOME=__FINALPATH__/ve3/bin/" "PYTHONPATH=__FINALPATH__/.pythonz/pythons/CPython-3.6.6/lib/python3.6"
 WorkingDirectory=__FINALPATH__
 ExecStart=__FINALPATH__/ve3/bin/python ./run.py /home/CI_package_check/analyseCI.sh >> /var/log/__APP__/__APP__.log 2&>1
 
diff --git a/scripts/_common.sh b/scripts/_common.sh
index 61f13bf..547c448 100755
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -197,6 +197,108 @@ ynh_handle_getopts_args () {
 
 #=================================================
 
+ynh_print_log () {
+  echo "${1}"
+}
+
+# Print an info on stdout
+#
+# usage: ynh_print_info "Text to print"
+# | arg: text - The text to print
+ynh_print_info () {
+  ynh_print_log "[INFO] ${1}"
+}
+
+# Print a warning on stderr
+#
+# usage: ynh_print_warn "Text to print"
+# | arg: text - The text to print
+ynh_print_warn () {
+  ynh_print_log "[WARN] ${1}" >&2
+}
+
+# Print a error on stderr
+#
+# usage: ynh_print_err "Text to print"
+# | arg: text - The text to print
+ynh_print_err () {
+  ynh_print_log "[ERR] ${1}" >&2
+}
+
+# Execute a command and print the result as an error
+#
+# usage: ynh_exec_err command to execute
+# usage: ynh_exec_err "command to execute | following command"
+# In case of use of pipes, you have to use double quotes. Otherwise, this helper will be executed with the first command, then be send to the next pipe.
+#
+# | arg: command - command to execute
+ynh_exec_err () {
+	ynh_print_err "$(eval $@)"
+}
+
+# Execute a command and print the result as a warning
+#
+# usage: ynh_exec_warn command to execute
+# usage: ynh_exec_warn "command to execute | following command"
+# In case of use of pipes, you have to use double quotes. Otherwise, this helper will be executed with the first command, then be send to the next pipe.
+#
+# | arg: command - command to execute
+ynh_exec_warn () {
+	ynh_print_warn "$(eval $@)"
+}
+
+# Execute a command and force the result to be printed on stdout
+#
+# usage: ynh_exec_warn_less command to execute
+# usage: ynh_exec_warn_less "command to execute | following command"
+# In case of use of pipes, you have to use double quotes. Otherwise, this helper will be executed with the first command, then be send to the next pipe.
+#
+# | arg: command - command to execute
+ynh_exec_warn_less () {
+	eval $@ 2>&1
+}
+
+# Execute a command and redirect stdout in /dev/null
+#
+# usage: ynh_exec_quiet command to execute
+# usage: ynh_exec_quiet "command to execute | following command"
+# In case of use of pipes, you have to use double quotes. Otherwise, this helper will be executed with the first command, then be send to the next pipe.
+#
+# | arg: command - command to execute
+ynh_exec_quiet () {
+	eval $@ > /dev/null
+}
+
+# Execute a command and redirect stdout and stderr in /dev/null
+#
+# usage: ynh_exec_fully_quiet command to execute
+# usage: ynh_exec_fully_quiet "command to execute | following command"
+# In case of use of pipes, you have to use double quotes. Otherwise, this helper will be executed with the first command, then be send to the next pipe.
+#
+# | arg: command - command to execute
+ynh_exec_fully_quiet () {
+	eval $@ > /dev/null 2>&1
+}
+
+# Remove any logs for all the following commands.
+#
+# usage: ynh_print_OFF
+# WARNING: You should be careful with this helper, and never forgot to use ynh_print_ON as soon as possible to restore the logging.
+ynh_print_OFF () {
+	set +x
+}
+
+# Restore the logging after ynh_print_OFF
+#
+# usage: ynh_print_ON
+ynh_print_ON () {
+	set -x
+	# Print an echo only for the log, to be able to know that ynh_print_ON has been called.
+	echo ynh_print_ON > /dev/null
+}
+
+#=================================================
+
 # Read the value of a key in a ynh manifest file
 #
 # usage: ynh_read_manifest manifest key
diff --git a/scripts/backup b/scripts/backup
index 207770a..4de007a 100644
--- a/scripts/backup
+++ b/scripts/backup
@@ -53,8 +53,3 @@ ynh_backup "/etc/logrotate.d/$app"
 
 ynh_backup "/etc/systemd/system/$app.service"
 
-#=================================================
-# BACKUP OF PYTHONZ
-#=================================================
-
-ynh_backup "$HOME/.pythonz"
diff --git a/scripts/install b/scripts/install
index 7265666..2b9c4e4 100644
--- a/scripts/install
+++ b/scripts/install
@@ -94,24 +94,24 @@ ynh_system_user_create $app	# Créer un utilisateur système dédié à l'app
 # Get pythonz
 # curl -kL https://raw.githubusercontent.com/saghul/pythonz/master/pythonz-install
 # ./pythonz-install
-ynh_setup_source "$HOME/.pythonz" pythonz
+ynh_setup_source "$final_path/.pythonz" pythonz
 # Then install it
-python $HOME/.pythonz/pythonz_install.py
+python $final_path/.pythonz/pythonz_install.py
 
 # if ! grep --quiet "YunoRunner" /root/.bashrc
 # then
-#     [[ -s $HOME/.pythonz/etc/bashrc ]] && source $HOME/.pythonz/etc/bashrc # Added by YunoRunner
+#     [[ -s $final_path/.pythonz/etc/bashrc ]] && source $final_path/.pythonz/etc/bashrc # Added by YunoRunner
 # fi
 
 # Install Python 3.6.6
-$HOME/.pythonz/bin/pythonz install 3.6.6
+$final_path/.pythonz/bin/pythonz install 3.6.6
 
 #=================================================
 # INSTALL YUNORUNNER DEPENDENCIES
 #=================================================
 
 ( cd $final_path
-virtualenv -p $($HOME/.pythonz/bin/pythonz locate 3.6.6) ve3
+virtualenv -p $($final_path/.pythonz/bin/pythonz locate 3.6.6) ve3
 ve3/bin/pip3 install -r requirements.txt )
 
 #=================================================
diff --git a/scripts/remove b/scripts/remove
index fe01e3a..a4ba2cb 100755
--- a/scripts/remove
+++ b/scripts/remove
@@ -72,10 +72,6 @@ fi
 #=================================================
 # SPECIFIC REMOVE
 #=================================================
-# REMOVE PYTHONZ
-#=================================================
-
-ynh_secure_remove "$HOME/.pythonz"
 
 # Suppression des log
 ynh_secure_remove "/var/log/$app"
diff --git a/scripts/restore b/scripts/restore
index 1965428..2366206 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -90,12 +90,6 @@ ynh_restore_file "/etc/systemd/system/$app.service"
 ## Démarrage auto du service
 systemctl enable $app.service
 
-#=================================================
-# RESTORE OF PYTHONZ
-#=================================================
-
-ynh_restore_file "$HOME/.pythonz"
-
 #=================================================
 # BACKUP OF THE LOGROTATE CONFIGURATION
 #=================================================