https://github.com/matthewcroughan/nixblitz

NixBlitz - Using Nix to implement RaspiBlitz with NixOS as the base
https://github.com/matthewcroughan/nixblitz

bitcoin nix nixos

Last synced: 3 months ago
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NixBlitz - Using Nix to implement RaspiBlitz with NixOS as the base

• Host: GitHub
• URL: https://github.com/matthewcroughan/nixblitz
• Owner: MatthewCroughan
• Created: 2022-07-14T04:23:42.000Z (over 2 years ago)
• Default Branch: master
• Last Pushed: 2022-07-15T08:20:30.000Z (over 2 years ago)
• Last Synced: 2024-05-01T19:14:54.030Z (9 months ago)
• Topics: bitcoin, nix, nixos
• Language: Nix
• Homepage:
• Size: 8.79 KB
• Stars: 6
• Watchers: 2
• Forks: 4
• Open Issues: 2
• Metadata Files:
  • Readme: README.md

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README

        
### On x86_64-linux, NixOS

If you're running NixOS and want to build the Raspberry Pi 4 Image, you'll need to

emulate an arm64 machine by adding the following to your NixOS configuration.

```

{

  boot.binfmt.emulatedSystems = [ "aarch64-linux" ];

}

```

Then you will be able to run `nix build .#images.pi` and get a result you can

flash to an SD Card and boot.

### On x86_64-linux non NixOS

If you are not running NixOS, you will have to follow complicated guides such as

the following for your distribution of choice, to enable binfmt for your

distribution:

- https://wiki.debian.org/QemuUserEmulation

Then you will be able to run `nix build .#images.pi` in the same way and get a

result you can flahs to an SD Card and boot.

### On aarch64-linux any distribution

If you are actually running `nix` on a Pi, you can just `nix build .#images.pi`

and no binfmt stuff is necessary.

### What is binfmt and why is it needed?

To avoid the need to cross-compile anything, and make use of cache.nixos.org,

`nix build .#images.pi` will actually spin up QEMU and emulate an arm64 machine

for every package/derivation that needs to be compiled. Binfmt is a kernel

feature that will transparently spin up a QEMU VM whenever any program tries to

spawn a process for a foreign architecture.

###  Will there be a cross-compilation option?

Yes, soon. But there are some quirks with Python cross-compilation that need to

be worked out first.