nix-shell command doesn't work

[chaotaklon]

In repository root directory
$ nix-shell

got:
unpacking 'https://github.com/edolstra/flake-compat/archive/cecfd08d13ddef8a79f277e67b8084bd9afa1586.tar.gz'...
unpacking 'https://api.github.com/repos/numtide/flake-utils/tarball/a586a6b966d59f53f45a04f8891fbc017dc09dbe'...
error: nix-shell requires a single derivation
Try 'nix-shell --help' for more information.

Did I do it incorrectly?

OS: Mac Big Sur (M1)
Nix version: 2.3.15

[nakulthebuilder]

Same problem for me, OS: Mac Big Sur (M1)

[drupol]

I think you should use Nix flakes (https://nixos.wiki/wiki/Flakes) and then run:

nix build .#ctfp
nix build .#ctfp-reason
nix build .#ctfp-scala
nix build .#ctfp-ocaml