nix: Make nix the root

Which means now I'll have to think about real prefixes in commit names.

unprocessed/config/polybar/bbswitch

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+
+if [ -f /proc/acpi/bbswitch ]
+then
+    echo -n 
+    state="$(grep -o '\w\+$' /proc/acpi/bbswitch)"
+    if [ "$state" == "ON" ]
+    then
+        echo ""
+    elif [ "$state" == "OFF" ]
+    then
+        echo ""
+    else
+        echo "?"
+    fi
+else
+    echo
+fi