lib.fileset: Use a nix-shell shebang for benchmark.sh

Changed files
+2 -1
lib
fileset
+2 -1
lib/fileset/benchmark.sh
···
-
#!/usr/bin/env bash
# Benchmarks lib.fileset
# Run:
···
+
#!/usr/bin/env nix-shell
+
#!nix-shell -i bash -p sta jq bc nix -I nixpkgs=../..
# Benchmarks lib.fileset
# Run: