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# Hacking
This section provides some notes on how to hack on Nix. To get the
latest version of Nix from GitHub:
$ git clone https://github.com/NixOS/nix.git
$ cd nix
To build Nix for the current operating system/architecture use
$ nix-build
or if you have a flakes-enabled nix:
$ nix build
This will build `defaultPackage` attribute defined in the `flake.nix`
file. To build for other platforms add one of the following suffixes to
it: aarch64-linux, i686-linux, x86\_64-darwin, x86\_64-linux. i.e.
$ nix-build -A defaultPackage.x86_64-linux
To build all dependencies and start a shell in which all environment
variables are set up so that those dependencies can be found:
$ nix-shell
To build Nix itself in this shell:
[nix-shell]$ ./bootstrap.sh
[nix-shell]$ ./configure $configureFlags
[nix-shell]$ make -j $NIX_BUILD_CORES
To install it in `$(pwd)/inst` and test it:
[nix-shell]$ make install
[nix-shell]$ make installcheck
[nix-shell]$ ./inst/bin/nix --version
nix (Nix) 2.4
If you have a flakes-enabled nix you can replace:
$ nix-shell
by:
$ nix develop
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