nix: Make nix the root

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

unprocessed/termux/scripts/service

@@ -0,0 +1,22 @@
+#!/data/data/com.termux/files/usr/bin/bash
+#
+# Run & stop Termux services
+#
+
+if [ $# -lt 1 ]
+then
+    echo "Expected a service name as first argument."
+    exit 1
+fi
+
+service="$1"
+file="$HOME/.termux/services/$1"
+
+if [ -f "$file" ]
+then
+    shift
+    $file "$@"
+else
+    echo "Service not found: $1"
+fi
+