diff --git a/spcd.sh b/spcd.sh
index bb9007f..d081c44 100644
--- a/spcd.sh
+++ b/spcd.sh
@@ -528,14 +528,13 @@ spcd_set_https_verification_off() {
 
 spcd_set_dns_resolving() {
 	spcd_step "Set DNS resolving"
-	spcd_sdr__index=1
-	eval "spcd_sdr__value=\"\${SPCD_DNS_${spcd_sdr__index}}\""
-	while [ -n "${spcd_sdr__value}" ]; do
+	while true; do
+		spcd_sdr__index=$((spcd_sdr__index + 1))
+		eval "spcd_sdr__value=\"\${SPCD_DNS_${spcd_sdr__index}}\""
+		[ -n "${spcd_sdr__value}" ] || break
 		spcd_sdr__text="${spcd_sdr__text}\
 nameserver ${spcd_sdr__value}
 "
-		spcd_sdr__index=$((spcd_sdr__index + 1))
-		eval "spcd_sdr__value=\"\${SPCD_DNS_${spcd_sdr__index}}\""
 	done
 	spcd_write "${SPCD_DNS_FILE}" "${spcd_sdr__text}"
 }
@@ -558,15 +557,14 @@ spcd_install_ca_certificates() {
 spcd_write_ca_certificates() {
 	spcd_step "Write CA certificates"
 	spcd_mkdir "${SPCD_CA_ROOT}"
-	spcd_wcc__index=1
-	eval "spcd_wcc__text=\"\${SPCD_CA_${spcd_wcc__index}}\""
-	while [ -n "${spcd_wcc__text}" ]; do
+	while true; do
+		spcd_wcc__index=$((spcd_wcc__index + 1))
+		eval "spcd_wcc__text=\"\${SPCD_CA_${spcd_wcc__index}}\""
+		[ -n "${spcd_wcc__text}" ] || break
 		spcd_wcc__path="${SPCD_CA_ROOT}/${spcd_wcc__index}.crt"
 		spcd_split
 		spcd_write "${spcd_wcc__path}" "${spcd_wcc__text}"
 		spcd_openssl "${spcd_wcc__path}"
-		spcd_wcc__index=$((spcd_wcc__index + 1))
-		eval "spcd_wcc__text=\"\${SPCD_CA_${spcd_wcc__index}}\""
 	done
 }
 
@@ -706,21 +704,22 @@ spcd_install_packages() {
 index-url = ${SPCD_URL_PYTHON}
 "
 	spcd_split
-	spcd_ip__venv="/opt/venv"
-	"${SPCD_PYTHON_ALIAS}" -m "venv" "${spcd_ip__venv}"
-	. "${spcd_ip__venv}/bin/activate"
+	"${SPCD_PYTHON_ALIAS}" -m "venv" "${SPCD_VENV}"
+	spcd_split
+	. "${SPCD_VENV}/bin/activate"
 	spcd_split
 	pip install --upgrade "pip"
 	spcd_split
 	pip install \
-	"pelican" \
-	"ruff" \
-	"sphinx"
+		"pelican" \
+		"ruff" \
+		"sphinx"
 }
 
 spcd_install_python_modules() {
 	spcd_step "Install Python modules"
 	spcd_ipm__root="$(mktemp --directory)" || exit
+	spcd_ipm__target="${SPCD_VENV}/lib/${SPCD_PYTHON_COMMAND}/site-packages"
 	echo "→ ${spcd_ipm__root}"
 	for spcd_ipm__repository in "${SPCD_GIT_MAIN}" "${SPCD_GIT_ROOT}"; do
 		case "${spcd_ipm__repository}" in
@@ -742,15 +741,15 @@ ${spcd_ipm__url}
 		echo "\
 ${spcd_ipm__path}
 ↓
-${SPCD_PYTHON_PACKAGES}"
-		cp --recursive "${spcd_ipm__path}" "${SPCD_PYTHON_PACKAGES}" ||
+${spcd_ipm__target}"
+		cp --recursive "${spcd_ipm__path}" "${spcd_ipm__target}" ||
 			exit
 		# check matching of file and variable
 		spcd_ipm__script="${spcd_ipm__root}/${spcd_ipm__name}/spcd.sh"
 		if [ -f "${spcd_ipm__script}" ]; then
 			spcd_split
 			spcd_ipm__check="${spcd_ipm__root}/check.sha512sum"
-			sha512sum "${spcd_ipm__script}" > "${spcd_ipm__check}"
+			sha512sum "${spcd_ipm__script}" >"${spcd_ipm__check}"
 			printf "%s" "${SPCD}" >"${spcd_ipm__script}"
 			ls -l "${spcd_ipm__script}"
 			dos2unix "${spcd_ipm__script}"
@@ -949,6 +948,8 @@ SPCD_PM_APT="apt"
 SPCD_PM_DNF="dnf"
 SPCD_PM_PACMAN="pacman"
 
+SPCD_VENV="/opt/venv"
+
 SPCD_HORIZONTAL="────╌╌╌╌┄┄┄┄┈┈┈┈"
 
 SPCD_OPEN="${SPCD_BOX_DOWN}${SPCD_BOX_LEFT}"