diff --git a/spcd/bootstrap.sh b/spcd/bootstrap.sh
index 2edd1c7..7ad7504 100644
--- a/spcd/bootstrap.sh
+++ b/spcd/bootstrap.sh
@@ -84,7 +84,7 @@ _spcd_banner_add_index() {
     unset spcd_bai__level
     while true; do
         spcd_bai__level=$((spcd_bai__level + 1))
-        eval "spcd_bai__value=\"\${SPCD_STEP_${spcd_bai__level}_INDEX}\""
+        eval "spcd_bai__value=\"\${__SPCD_STEP_${spcd_bai__level}_INDEX}\""
         [ -n "${spcd_bai__value}" ] || break
         if [ -n "${spcd_bai__label}" ]; then
             spcd_bai__label="${spcd_bai__label}.${spcd_bai__value}"
@@ -125,7 +125,7 @@ _spcd_banner_render() {
     unset spcd_br__level
     while true; do
         spcd_br__level=$((spcd_br__level + 1))
-        eval "spcd_br__value=\"\${SPCD_STEP_${spcd_br__level}_LABEL}\""
+        eval "spcd_br__value=\"\${__SPCD_STEP_${spcd_br__level}_LABEL}\""
         [ -n "${spcd_br__value}" ] || break
         _spcd_banner_add "${spcd_br__value}"
     done
@@ -206,8 +206,8 @@ _SPCD_STEP_LEVEL=1
 
 _spcd_step_wipe() {
     unset \
-        "SPCD_STEP_${_SPCD_STEP_LEVEL}_INDEX" \
-        "SPCD_STEP_${_SPCD_STEP_LEVEL}_LABEL"
+        "__SPCD_STEP_${_SPCD_STEP_LEVEL}_INDEX" \
+        "__SPCD_STEP_${_SPCD_STEP_LEVEL}_LABEL"
 }
 
 # ╭───────────╮
@@ -376,7 +376,7 @@ spcd_split() {
 
 spcd_step() {
     if [ -n "${1}" ]; then
-        spcd_step__prefix="SPCD_STEP_${_SPCD_STEP_LEVEL}"
+        spcd_step__prefix="__SPCD_STEP_${_SPCD_STEP_LEVEL}"
         spcd_step__index="${spcd_step__prefix}_INDEX"
         eval "${spcd_step__index}=\$((${spcd_step__index} + 1))"
         eval "${spcd_step__prefix}_LABEL=\"${1}\""
@@ -1216,7 +1216,7 @@ spcd_python_write_module() {
         spcd_wpm__text="${spcd_wpm__text}${spcd_wpm__value}
 "
     done
-    spcd_wpm__index=$((SPCD_STEP_1_INDEX + 1))
+    spcd_wpm__index=$((__SPCD_STEP_1_INDEX + 1))
     for spcd_wpm__root in \
         "${SPCD_PYTHON_PACKAGES}" "${SPCD_PYTHON_VENV_PACKAGES}"; do
         spcd_os_write "${spcd_wpm__root}/env.py" "${spcd_wpm__text}