This documents the outcome of the change in
https://github.com/NixOS/nix/issues/454:
> We can also automatically add parentheses in the generated
> `buildInputs`, so you can type `nix-shell -p "expr"`
> instead of `"(expr").
- The instructions for using nix-shell as an interpreter has a Haskell script
example that doesn't work on more recent versions of Nix. Update the
instructions with a working command
‘--run’ is like ‘--command’, except that it runs the command in a
non-interactive shell. This is important if you do things like:
$ nix-shell --command make
Hitting Ctrl-C while make is running drops you into the interactive
Nix shell, which is probably not what you want. So you can now do
$ nix-shell --run make
instead.
