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-# Language
- `nix repl` to interactively evaluate Nix expressions. `:p` if output is not full.
- `nix-instantiate --eval <file>.nix` to evaluate a Nix expression from a file. `--strict`.
-
-Nix is like JSON, but with functions. 
-Recursive attribute sets can reference values declared earlier in the same set. 
-```nix
-rec {
-  one = 1;
-  two = one + 1;
-}
-```
- 
-A `let` binding is used to assign names to values just as attribute sets, they can then be used in expressions. Let bindings have a local scope.
-
-A `with` allows referencing attributes of attribute sets without referencing the set.
-# Flakes
-Nix flakes are source trees containing a file `flake.nix` at their root. The file `flake.nix` provides a standardized way to provide [[Zettelkast/Index/Nix]] artifacts. It's like a package manager for [[Zettelkast/Index/Nix]]. A flake can be dependent on other Flakes and it's possible to pin dependencies to exact revisions by using a `flake.lock` file.
-
-Nix flake evaluation is hermetic, meaning that it produces the same result wherever it's built.k
-
-The feature can be enabled in `~/.config/nix/nix.conf`:
-
-```
-experimental-features = nix-command flakes
-```
-
-To initialize in a repo: `nix flake init`.
-
-In flakes dependencies have to be specified explicitly and MUST be locked to specific versions therefore it's no longer allowed to use the nixpkgs found in `NIX_PATH` by referencing it like `<nixpkgs>`.
-
-Output of a Flake is an arbitrary [[Zettelkast/Index/Nix]] value such as a package, [[NixOS]] module or library function.
-Commands `nix build` and `nix shell` will build the output `packages.<system>.default` unless we specify another output, for example: `nix shell .#checks.aarch64-linux.build`.
-
-# Overlays
-[[TODO]]
-
-# Shell.nix
-Can be used to set up per dir environments, e.g using direnv to automatically activate them.
-## Python
-https://nixos.org/manual/nixpkgs/stable/#python
-
-```nix
-{ pkgs ? import <nixpkgs> {}}:
-
-pkgs.mkShell {
-    packages = [ pkgs.virtualenv ];
-}
-```
-
-```nix
-with import <nixpkgs> {};
-( 
-let my_toolz = python311.pkgs.buildPythonPackage rec { pname = "toolz"; version = "0.10.0"; pyproject = true; src = fetchPypi { inherit pname version; hash = "sha256-CP3V73yWSArRHBLUct4hrNMjWZlvaaUlkpm1QP66RWA="; }; nativeBuildInputs = [ python311.pkgs.setuptools python311.pkgs.wheel ]; # has no tests doCheck = false; meta = { homepage = "https://github.com/pytoolz/toolz/"; description = "List processing tools and functional utilities"; # [...] }; }; in python311.withPackages (ps: with ps; [ numpy my_toolz ]) ).env
-```
-
----
-[Flakes Wiki](https://nixos.wiki/wiki/Flakes)
-\ No newline at end of file