diff --git a/scripts/_common.sh b/scripts/_common.sh
index 999eae6..4765e90 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -24,7 +24,8 @@ fi
 
 function refresh_collect()
 {
-    python3 manage_${app}.py collectstatic --noinput -l
+    pushd $install_dir
+    venv/bin/python3 manage_${app}.py collectstatic --noinput -l
     rm -rf ${app}/static/static
     rm -rf ${app}/static/plugins
     rm -rf ${app}/static/tmp
@@ -34,4 +35,5 @@ function refresh_collect()
     rm -rf ${app}/static/settings.py
     rm -rf ${app}/static/django_error.log
     rm -rf ${app}/static/__init__.py
+    popd
 }
diff --git a/scripts/install b/scripts/install
index 0d9ec42..f622968 100644
--- a/scripts/install
+++ b/scripts/install
@@ -10,24 +10,15 @@ ynh_script_progression --message="Installing app..." --weight=5
 
 pushd $install_dir
 python3 -m venv venv
-. venv/bin/activate
-pip3 install -U lucterios lucterios-standard lucterios-contacts lucterios-documents
-pip3 install -U diacamma-asso diacamma-syndic diacamma-financial
-pip3 install -U gunicorn psycopg2-binary psycopg2
-lucterios_admin.py installed
-sitepackpath=$install_dir/venv/lib/python3.9/site-packages
-export PYTHONPATH="$sitepackpath:$sitepackpath/lucterios:$sitepackpath/diacamma:$sitepackpath/diacamma/accounting:$sitepackpath/diacamma/asso:$sitepackpath/diacamma/condominium:$sitepackpath/diacamma/event:$sitepackpath/diacamma/invoice:$sitepackpath/diacamma/member:$sitepackpath/diacamma/payoff:$sitepackpath/diacamma/syndic"
-
-ls -l $install_dir/venv/lib/python*/site-packages/lucterios
-ls -l $install_dir/venv/lib/python*/site-packages/diacamma
-ls -l $install_dir/venv/lib/python*/site-packages/diacamma/member
-ynh_script_progression --message=" >> PYTHONPATH=${PYTHONPATH}"
-lucterios_admin.py add -n ${app} -p "${APPLITYPE}" -m "${MODULES}" -d "${DATABASE}" -e '{"LANGUAGES":"'${language}'"}'
+venv/bin/pip3 install -U lucterios lucterios-standard lucterios-contacts lucterios-documents
+venv/bin/pip3 install -U diacamma-asso diacamma-syndic diacamma-financial
+venv/bin/pip3 install -U gunicorn psycopg2-binary psycopg2
+venv/bin/lucterios_admin.py installed
+venv/bin/lucterios_admin.py add -n ${app} -p "${APPLITYPE}" -m "${MODULES}" -d "${DATABASE}" -e '{"LANGUAGES":"'${language}'"}'
+popd
 
 refresh_collect
 
-popd
-
 chmod 400 "$install_dir/"
 chown ${app}:${app} "$install_dir/"
 
diff --git a/scripts/upgrade b/scripts/upgrade
index 79dca16..e5ca295 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -43,13 +43,12 @@ ynh_systemd_action --service_name=$app --action="stop" --log_path="/var/log/$app
 ynh_script_progression --message="Updating Diacamma..."
 
 pushd $install_dir
-. venv/bin/activate
-lucterios_admin.py check
-lucterios_admin.py update
-lucterios_admin.py refreshall
+venv/bin/lucterios_admin.py check
+venv/bin/lucterios_admin.py update
+venv/bin/lucterios_admin.py refreshall
+popd
 
 refresh_collect
-popd
 
 chmod 400 "$install_dir/"
 chown ${app}:${app} "$install_dir/"