diff --git a/scripts/install b/scripts/install
index dee4871..699c52d 100644
--- a/scripts/install
+++ b/scripts/install
@@ -107,7 +107,7 @@ ynh_add_nginx_config
 
 
 # configure friendica
-sudo cp /var/www/friendica/htconfig.php /var/www/friendica/.htconfig.php
+sudo cp "/var/www/$app/htconfig.php" "/var/www/$app/.htconfig.php"
 ynh_replace_string "your.mysqlhost.com" "localhost" "$final_path/.htconfig.php"
 ynh_replace_string "mysqlusername" "$db_name" "$final_path/.htconfig.php"
 ynh_replace_string "mysqldatabasename" "$db_name" "$final_path/.htconfig.php"
@@ -157,7 +157,7 @@ sudo cp ../conf/poller-cron /etc/cron.d/$app
 ynh_store_file_checksum "$final_path/.htconfig.php"
 
 # Run composer 
-cd $final_path && sudo php bin/composer.phar install
+(cd $final_path && sudo php bin/composer.phar install)
 
 #=================================================
 # SETUP SSOWAT
diff --git a/scripts/restore b/scripts/restore
index 4c29748..0310723 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -95,7 +95,7 @@ sudo chmod -R 777 $final_path/view/smarty3
 ynh_restore_file "/etc/cron.d/$app"
 
 # Run composer 
-cd $final_path && sudo php bin/composer.phar install
+(cd $final_path && sudo php bin/composer.phar install)
 
 # unprotected_uris allows SSO credentials to be passed anyway.
 ynh_app_setting_set $app unprotected_uris "/"
diff --git a/scripts/upgrade b/scripts/upgrade
index 05490ac..807ab96 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -104,7 +104,7 @@ sed -i "s@YNH_WWW_PATH@$final_path@g" ../conf/poller-cron
 sudo cp ../conf/poller-cron /etc/cron.d/$app
 
 # Run composer 
-cd $final_path && sudo php bin/composer.phar install
+(cd $final_path && sudo php bin/composer.phar install)
 
 #=================================================
 # SETUP SSOWAT