In addition to x86 builds, nixbuild.net also supports Arm builds. Both
aarch64-linux (64 bit) and
armv7l-linux (32 bit) builds are supported.
Arm builds are currently priced and invoiced exactly the same as x86 builds, but this might change in the future.
To run Arm builds on nixbuild.net, add additional remote builders to your Nix configuration in the same way as you do for x86 builders:
eu.nixbuild.net x86_64-linux - 100 1 big-parallel,benchmark eu.nixbuild.net aarch64-linux - 100 1 big-parallel,benchmark eu.nixbuild.net armv7l-linux - 100 1 big-parallel,benchmark
aarch64-linux support in nixbuild.net was announced in this blog