diff --git a/kickstart/veilor-os.ks b/kickstart/veilor-os.ks
index 028ed0c..725b70e 100644
--- a/kickstart/veilor-os.ks
+++ b/kickstart/veilor-os.ks
@@ -131,8 +131,8 @@ fira-code-fonts
 %end
 
 # ── Post-install (nochroot): copy overlay tree into installed root ──
-%post --nochroot
-set -eu
+%post --nochroot --erroronfail
+set -uo pipefail
 # DEST: livecd-creator sets INSTALL_ROOT, livemedia-creator uses /mnt/sysimage.
 DEST="${INSTALL_ROOT:-/mnt/sysimage}"
 [[ -d $DEST ]] || { echo "[ERR] DEST=$DEST does not exist (livecd-creator? livemedia-creator?)" >&2; exit 1; }
@@ -162,11 +162,24 @@ if [[ -z $SRC ]]; then
     exit 1
 fi
 
-echo "[INFO] using SRC=$SRC"
-cp -a "$SRC/overlay/." "$DEST/"
-mkdir -p "$DEST/usr/share/veilor-os"
-cp -a "$SRC/assets" "$DEST/usr/share/veilor-os/"
-cp -a "$SRC/scripts" "$DEST/usr/share/veilor-os/"
+echo "[INFO] using SRC=$SRC DEST=$DEST"
+set -x
+cp -a "$SRC/overlay/." "$DEST/" || echo "[ERR] overlay cp failed: $?"
+mkdir -p "$DEST/usr/share/veilor-os" || echo "[ERR] mkdir failed: $?"
+ls -la "$SRC/assets" "$SRC/scripts" 2>&1 || echo "[ERR] assets/scripts missing in $SRC"
+cp -a "$SRC/assets" "$DEST/usr/share/veilor-os/" || echo "[ERR] assets cp failed: $?"
+cp -a "$SRC/scripts" "$DEST/usr/share/veilor-os/" || echo "[ERR] scripts cp failed: $?"
+ls -la "$DEST/usr/share/veilor-os/" 2>&1 || echo "[ERR] dest dir missing post-cp"
+set +x
+
+# Persist nochroot log into installed system for diagnostics
+{
+    echo "=== %post --nochroot trace ==="
+    date
+    echo "SRC=$SRC DEST=$DEST"
+    ls -la "$DEST/usr/share/veilor-os/" 2>&1
+    ls -la "$DEST/usr/local/sbin/" 2>&1
+} > "$DEST/var/log/veilor-nochroot.log" 2>&1 || true
 %end
 
 # ── Post-install (chroot): apply hardening, theme, branding ──