diff --git a/spcd.sh b/spcd.sh
index 4ff13da..f2f47d6 100644
--- a/spcd.sh
+++ b/spcd.sh
@@ -12,6 +12,7 @@
 
 # main
 spcd_main() {
+	spcd_list_environment_variables
 	spcd_set_environment_variables
 	#
 	spcd_list_working_directory
@@ -33,6 +34,7 @@ spcd_main() {
 	spcd_install_python
 	# TODO move to Python
 	spcd_install_packages
+	spcd_clean_packages_cache
 	spcd_install_python_modules
 	spcd_write_python_module
 	spcd_switch_to_python "${@}"
@@ -40,6 +42,19 @@ spcd_main() {
 
 # steps
 
+spcd_list_environment_variables() {
+	spcd_step "List environment variables"
+	for spcd_lev__name in $(printenv | cut -d = -f 1 | sort); do
+		if [ "${spcd_lev__name}" != "SPCD_SSH_KEY" ]; then
+			spcd_lev__text=
+			eval "spcd_lev__text=\"\${${spcd_lev__name}}\""
+			echo "${spcd_lev__name}=${spcd_lev__text}"
+		else
+			echo "${spcd_lev__name}"
+		fi
+	done
+}
+
 spcd_set_environment_variables() {
 	spcd_step "Set environment variables"
 	# continuous integration / github → gitea → forgejo
@@ -686,6 +701,11 @@ spcd_install_packages() {
 	esac
 }
 
+spcd_clean_packages_cache() {
+	spcd_step "Clean packages cache"
+	${SPCD_PM_CLEAN} || exit
+}
+
 spcd_install_python_modules() {
 	spcd_step "Install Python modules"
 	spcd_ipm__root="$(mktemp --directory)" || exit
@@ -790,7 +810,6 @@ spcd_install_package() {
 	spcd_install_package__name="${1}"
 	if [ -n "${spcd_install_package__name}" ]; then
 		${SPCD_PM_INSTALL} "${spcd_install_package__name}" || exit
-		${SPCD_PM_CLEAN} || exit
 	fi
 }