nix: Make nix the root

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

unprocessed/config/offlineimap.py

@@ -0,0 +1,10 @@
+#! /usr/bin/env python2
+from subprocess import check_output
+
+
+def get_pass(account):
+    return check_output("pass " + account, shell=True).splitlines()[0]
+
+def beep():
+    check_output("play -n synth sine E4 sine A5 remix 1-2 fade 0.5 1.2 0.5 2", shell=True)
+