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# 19-devshell-vs-shellfor
This example compares two dev shell styles for the same local package.
It includes:
- a generic `mkShell` shell,
- a Haskell-specific `shellFor` shell,
- one local package that both shells support, and
- a test suite run by `nix flake check`.
Useful commands:
```bash
nix develop .#generic
nix develop .#shellFor
nix build
./result/bin/mini-shell-choice
nix flake check
```