nix-shell

Start an interactive shell based on a Nix expression.

TLDR

Start with nix expression in shell.nix or default.nix in the current directory

$ nix-shell
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Run shell command in non-interactive shell and exit

$ nix-shell --run "[command] [command_arguments]"
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Start with expression in default.nix in the current directory

$ nix-shell [default.nix]
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Start with packages loaded from nixpkgs

$ nix-shell --packages [package_name_1] [package_name_2]
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Start with packages loaded from specific nixpkgs revision

$ nix-shell --packages [package_names] -I nixpkgs=[https://github.com/NixOS/nixpkgs/archive/nixpkgs_revision.tar.gz]
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Evaluate rest of file in specific interpreter, for use in #!-scripts (see <https://nixos.org/manual/nix/stable/#use-as-a-interpreter>)

$ nix-shell -i [interpreter] --packages [package_names]
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