NixOS on ARM: Difference between revisions
mNo edit summary |
mNo edit summary |
||
| Line 498: | Line 498: | ||
You can customize image by using the following snippet. | You can customize image by using the following snippet. | ||
< | <syntaxhighlight lang="nix"> | ||
# save as sd-image.nix somewhere | # save as sd-image.nix somewhere | ||
{ ... }: { | { ... }: { | ||
| Line 509: | Line 509: | ||
]; | ]; | ||
} | } | ||
</ | </syntaxhighlight> | ||
Then build with: | Then build with: | ||
< | <syntaxhighlight lang="nix"> | ||
$ nix-build '<nixpkgs/nixos>' -A config.system.build.sdImage -I nixos-config=./sd-image.nix | $ nix-build '<nixpkgs/nixos>' -A config.system.build.sdImage -I nixos-config=./sd-image.nix | ||
</ | </syntaxhighlight> | ||
Note that this requires a machine with aarch64. You can however also build it from your laptop using an aarch64 remote builder as described in [[Distributed build]] or ask for access on the [https://github.com/nix-community/aarch64-build-box community aarch64 builder]. | Note that this requires a machine with aarch64. You can however also build it from your laptop using an aarch64 remote builder as described in [[Distributed build]] or ask for access on the [https://github.com/nix-community/aarch64-build-box community aarch64 builder]. | ||
| Line 521: | Line 521: | ||
if you use the experimental flake, instead of doing the above stuff, can put the following lines in <code>flake.nix</code>, <code>git add flake.nix</code> and build with <code>nix build .#images.rpi2</code>: | if you use the experimental flake, instead of doing the above stuff, can put the following lines in <code>flake.nix</code>, <code>git add flake.nix</code> and build with <code>nix build .#images.rpi2</code>: | ||
< | <syntaxhighlight lang="nix"> | ||
{ | { | ||
description = "Build image"; | description = "Build image"; | ||
| Line 540: | Line 540: | ||
}; | }; | ||
} | } | ||
</ | </syntaxhighlight> | ||
=== Cross-compiling === | === Cross-compiling === | ||
| Line 546: | Line 546: | ||
It is possible to cross-compile from a different architecture. To cross-compile to <code>armv7l</code>, on the same <code>sd-image.nix</code> add in <code>crossSystem</code>: | It is possible to cross-compile from a different architecture. To cross-compile to <code>armv7l</code>, on the same <code>sd-image.nix</code> add in <code>crossSystem</code>: | ||
< | <syntaxhighlight lang="nix"> | ||
{ ... }: { | { ... }: { | ||
nixpkgs.crossSystem.system = "armv7l-linux"; | nixpkgs.crossSystem.system = "armv7l-linux"; | ||
| Line 554: | Line 554: | ||
# ... | # ... | ||
} | } | ||
</ | </syntaxhighlight> | ||
=== Compiling through binfmt QEMU === | === Compiling through binfmt QEMU === | ||
| Line 562: | Line 562: | ||
To enable the binfmt wrapper on NixOS, add the following to <code>configuration.nix</code> | To enable the binfmt wrapper on NixOS, add the following to <code>configuration.nix</code> | ||
< | <syntaxhighlight lang="nix"> | ||
{ | { | ||
boot.binfmt.emulatedSystems = [ "aarch64-linux" ]; | boot.binfmt.emulatedSystems = [ "aarch64-linux" ]; | ||
} | } | ||
</ | </syntaxhighlight> | ||
Then, add <code>--argstr system aarch64-linux</code> to the build command: | Then, add <code>--argstr system aarch64-linux</code> to the build command: | ||
< | <syntaxhighlight lang="nix"> | ||
$ nix-build '<nixpkgs/nixos>' -A config.system.build.sdImage -I nixos-config=./sd-image.nix --argstr system aarch64-linux | $ nix-build '<nixpkgs/nixos>' -A config.system.build.sdImage -I nixos-config=./sd-image.nix --argstr system aarch64-linux | ||
</ | </syntaxhighlight> | ||
If you are building on non-NixOS machine with QEMU binfmt wrapper configured, you will want to configure nix daemon to let it know that it can build for aarch64. Add the following line to <code>/etc/nix/nix.conf</code>: | If you are building on non-NixOS machine with QEMU binfmt wrapper configured, you will want to configure nix daemon to let it know that it can build for aarch64. Add the following line to <code>/etc/nix/nix.conf</code>: | ||
| Line 580: | Line 580: | ||
If you want to build just one specific package, use this: | If you want to build just one specific package, use this: | ||
< | <syntaxhighlight lang="nix"> | ||
nix-build '<nixpkgs/nixos>' -A pkgs.theRequiredPackage --argstr system aarch64-linux -I nixos-config=/path/to/target/machine/nixos/config/copy | nix-build '<nixpkgs/nixos>' -A pkgs.theRequiredPackage --argstr system aarch64-linux -I nixos-config=/path/to/target/machine/nixos/config/copy | ||
</ | </syntaxhighlight> | ||
(the last option should not be required on NixOS machines) | (the last option should not be required on NixOS machines) | ||