diff --git a/scripts/install b/scripts/install
index bca61bb..2ede847 100644
--- a/scripts/install
+++ b/scripts/install
@@ -55,7 +55,11 @@ ynh_script_progression --message="Building Movim..."
 # Install composer
 ynh_install_composer
 
-ynh_exec_warn_less ynh_composer_exec --commands="movim:migrate"
+# hack to make composer use php8.2 rather than system-default 7.4
+ln -s $(which php$phpversion) $install_dir/php
+
+ynh_exec_warn_less ynh_exec_as $app env PATH=$install_dir:$PATH ynh_composer_exec --commands="movim:migrate"
+rm $install_dir/php
 ynh_exec_as "$app" "php$phpversion" "$install_dir/daemon.php" config --username="$admin" --password="$password" --quiet
 
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index fa25076..398665b 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -65,9 +65,14 @@ ynh_script_progression --message="Building $app..."
 
 ynh_exec_warn_less ynh_install_composer
 
-ynh_exec_warn_less ynh_composer_exec --commands="config --global discard-changes true --quiet"
-ynh_exec_warn_less ynh_composer_exec --commands="update --no-interaction --quiet"
-ynh_exec_warn_less ynh_composer_exec --commands="movim:migrate --quiet"
+# hack to make composer use php8.2 rather than system-default 7.4
+ln -s $(which php$phpversion) $install_dir/php
+
+ynh_exec_warn_less ynh_exec_as $app env PATH=$install_dir:$PATH ynh_composer_exec --commands="config --global discard-changes true --quiet"
+ynh_exec_warn_less ynh_exec_as $app env PATH=$install_dir:$PATH ynh_composer_exec --commands="update --no-interaction --quiet"
+ynh_exec_warn_less ynh_exec_as $app env PATH=$install_dir:$PATH ynh_composer_exec --commands="movim:migrate --quiet"
+
+rm $install_dir/php
 
 #=================================================
 # REAPPLY SYSTEM CONFIGURATIONS