[clever@amd-nixos:~]$ nix-repl '<nixpkgs>'
Welcome to Nix version 1.11.6. Type :? for help.

Loading ‘<nixpkgs>’...
Added 7059 variables.

nix-repl> SDL2.outputs
[ "out" "dev" ]

nix-repl> :b SDL2
these paths will be fetched (0.52 MiB download, 2.70 MiB unpacked):
  /nix/store/0hjih1m0h2xyvh788bdb4lcq8pdcpx07-SDL2-2.0.4
  /nix/store/v5bp6rbmiyhsmlih8dxawcpwzh61mfj3-SDL2-2.0.4-dev
fetching path ‘/nix/store/0hjih1m0h2xyvh788bdb4lcq8pdcpx07-SDL2-2.0.4’...

*** Downloading ‘https://cache.nixos.org/nar/0q21gn8xdsvs9g4kxijd6b1hkvds50g6l7c0hvb12nf428fa9iim.nar.xz’ (signed by ‘cache.nixos.org-1’) to ‘/nix/store/0hjih1m0h2xyvh788bdb4lcq8pdcpx07-SDL2-2.0.4’...
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  343k  100  343k    0     0  65020      0  0:00:05  0:00:05 --:--:-- 83592

fetching path ‘/nix/store/v5bp6rbmiyhsmlih8dxawcpwzh61mfj3-SDL2-2.0.4-dev’...

*** Downloading ‘https://cache.nixos.org/nar/0biz4mx9kfym23w0yxma4w2cvk42knvbdkls1b379g7gh4q80jg7.nar.xz’ (signed by ‘cache.nixos.org-1’) to ‘/nix/store/v5bp6rbmiyhsmlih8dxawcpwzh61mfj3-SDL2-2.0.4-dev’...
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  186k  100  186k    0     0   374k      0 --:--:-- --:--:-- --:--:--  375k

warning: you did not specify ‘--add-root’; the result might be removed by the garbage collector
/nix/store/0hjih1m0h2xyvh788bdb4lcq8pdcpx07-SDL2-2.0.4
/nix/store/v5bp6rbmiyhsmlih8dxawcpwzh61mfj3-SDL2-2.0.4-dev

this derivation produced the following outputs:
  dev -> /nix/store/v5bp6rbmiyhsmlih8dxawcpwzh61mfj3-SDL2-2.0.4-dev
  out -> /nix/store/0hjih1m0h2xyvh788bdb4lcq8pdcpx07-SDL2-2.0.4

nix-repl>