diff --git a/install-pi.sh b/install-pi.sh
index 13c60c7..c8b457c 100755
--- a/install-pi.sh
+++ b/install-pi.sh
@@ -70,6 +70,12 @@ ensure_brew() {
 	success "Homebrew installed"
 }
 
+# ────────────────────────────────────────────
+# Detect OS / Architecture
+# ────────────────────────────────────────────
+OS="$(uname -s)"
+ARCH="$(uname -m)"
+
 # ────────────────────────────────────────────
 # Check required commands
 # ────────────────────────────────────────────
@@ -120,11 +126,8 @@ fi
 info "npm is available: $(command -v npm)"
 
 # ────────────────────────────────────────────
-# Detect OS / Architecture
+# Detect OS / Architecture (already set above)
 # ────────────────────────────────────────────
-OS="$(uname -s)"
-ARCH="$(uname -m)"
-
 case "$OS" in
 Darwin | Linux) ;;
 *)