nixos-and-flakes-book/docs/other-usage-of-flakes/inputs.md
2023-07-06 11:34:38 +08:00

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# Flake inputs {#flake-inputs}
The `inputs` in `flake.nix` is an attribute set, used to specify the dependencies of the current flake, there are many types of `inputs`, for example:
```nix
{
inputs = {
# use master branch of the GitHub repository as input, this is the most common input format
nixpkgs.url = "github:Mic92/nixpkgs/master";
# Git URL, can be used for any Git repository based on https/ssh protocol
git-example.url = "git+https://git.somehost.tld/user/path?ref=branch&rev=fdc8ef970de2b4634e1b3dca296e1ed918459a9e";
# The above example will also copy .git, use this for (shallow) local Git repos
git-directory-example.url = "git+file:/path/to/repo?shallow=1";
# Local directories (for absolute paths you can omit 'path:')
directory-example.url = "path:/path/to/repo";
bar = {
url = "github:foo/bar/branch";
# if the input is not a flake, you need to set flake=false
flake = false;
};
sops-nix = {
url = "github:Mic92/sops-nix";
# The `follows` keyword in inputs is used for inheritance.
# Here, `inputs.nixpkgs` of sops-nix is kept consistent with the `inputs.nixpkgs` in
# the current flake, to avoid problems caused by different versions of nixpkgs.
inputs.nixpkgs.follows = "nixpkgs";
};
# Pin flakes to a specific revision
nix-doom-emacs = {
url = "github:vlaci/nix-doom-emacs?rev=238b18d7b2c8239f676358634bfb32693d3706f3";
flake = false;
};
# To use a subdirectory of a repo, pass `dir=xxx`
nixpkgs.url = "github:foo/bar?dir=shu";
};
outputs = { self, ... }@inputs: { ... };
}
```