diff --git a/spcd/bootstrap.sh b/spcd/bootstrap.sh
index c80c600..7da2871 100644
--- a/spcd/bootstrap.sh
+++ b/spcd/bootstrap.sh
@@ -299,10 +299,10 @@ spcd_split() {
 spcd_step() {
     if [ -n "${1}" ]; then
         [ -n "${__SPCD_STEP_LEVEL}" ] || __SPCD_STEP_LEVEL=1
-        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}\""
+        local prefix="__SPCD_STEP_${__SPCD_STEP_LEVEL}"
+        local index="${prefix}_INDEX"
+        eval "${index}=\$((${index} + 1))"
+        eval "${prefix}_LABEL=\"${1}\""
         _spcd_banner_render
     fi
 }