diff --git a/contrib/kiss-repo-orphans b/contrib/kiss-repo-orphans
new file mode 100755
index 0000000..093c4ae
--- /dev/null
+++ b/contrib/kiss-repo-orphans
@@ -0,0 +1,17 @@
+#!/bin/sh -e
+# List packages which aren't present in any repository.
+
+cd "$KISS_ROOT/var/db/kiss/installed"
+
+for pkg in *; do
+    i=1
+
+    kiss s "$pkg" | while read -r line; do
+        case $i-$line in ("1-$PWD/$pkg")
+            printf '%s\n' "$pkg"
+            continue
+        esac
+
+        i=$((i + 1))
+    done
+done