diff --git a/setup/install-modules.sh b/setup/install-modules.sh
index fa9a891..40c0ba0 100755
--- a/setup/install-modules.sh
+++ b/setup/install-modules.sh
@@ -149,7 +149,13 @@ count_steps() {
     [[ "$sel" == *"kate"*            ]] && TOTAL=$(( TOTAL + 1 ))
 }
 
-[[ $EUID -eq 0 ]] && die "Run as your normal user (not root)."
+if [[ $EUID -eq 0 ]]; then
+    # Root context (e.g. archiso chroot): shim sudo as a passthrough
+    mkdir -p "$TMP_D/bin"
+    printf '#!/bin/bash\nexec "$@"\n' > "$TMP_D/bin/sudo"
+    chmod +x "$TMP_D/bin/sudo"
+    export PATH="$TMP_D/bin:$PATH"
+fi
 command -v pacman &>/dev/null || die "pacman not found — Arch Linux required."
 
 require_dialog
diff --git a/setup/simple-install.sh b/setup/simple-install.sh
index f5f9ec5..488ed06 100755
--- a/setup/simple-install.sh
+++ b/setup/simple-install.sh
@@ -395,7 +395,13 @@ get_mac_suffix() {
 }
 
 # ── Preflight ─────────────────────────────────────────────────────────────────
-[[ $EUID -eq 0 ]] && die "Run as your normal user (not root)."
+if [[ $EUID -eq 0 ]]; then
+    # Root context (e.g. archiso chroot): shim sudo as a passthrough
+    mkdir -p "$TMP_D/bin"
+    printf '#!/bin/bash\nexec "$@"\n' > "$TMP_D/bin/sudo"
+    chmod +x "$TMP_D/bin/sudo"
+    export PATH="$TMP_D/bin:$PATH"
+fi
 command -v pacman &>/dev/null || die "pacman not found — Arch Linux required."
 
 if $ANSWERFILE_MODE; then
diff --git a/setup/tui-install.sh b/setup/tui-install.sh
index 721d17e..27e5bbe 100755
--- a/setup/tui-install.sh
+++ b/setup/tui-install.sh
@@ -220,7 +220,13 @@ get_mac_suffix() {
 }
 
 # ── Preflight ─────────────────────────────────────────────────────────────────
-[[ $EUID -eq 0 ]] && die "Run as your normal user (not root)."
+if [[ $EUID -eq 0 ]]; then
+    # Root context (e.g. archiso chroot): shim sudo as a passthrough
+    mkdir -p "$TMP_D/bin"
+    printf '#!/bin/bash\nexec "$@"\n' > "$TMP_D/bin/sudo"
+    chmod +x "$TMP_D/bin/sudo"
+    export PATH="$TMP_D/bin:$PATH"
+fi
 command -v pacman &>/dev/null || die "pacman not found — Arch Linux required."
 
 require_dialog