Holonix

this implementation of holonix uses the flake- and crane-based nix expressions.

more advanced customization features are now possible via the flake's native input override feature.

recommended versioning specification in a consumer's flake.nix

use the "versions" flake as a separate input in their flake.nix and configuring the holochain flake to follow the versions flake, as in:

inputs = {
  holochain-versions.url = "github:holochain/holochain?dir=versions/0_1";

  holochain-flake.url = "github:holochain/holochain";
  holochain-flake.inputs.versions.follows = "holochain-versions";
};

override single components either via the holochain versions flake:

inputs = {
  holochain-versions.url = "github:holochain/holochain?dir=versions/0_1"; holochain-versions.inputs.holochain.url = "github:holochain/holochain/holochain-0.1.5-beta-rc.0";

  holochain-flake.url = "github:holochain/holochain";
  holochain-flake.inputs.versions.follows = "holochain-versions";
};

or via their the toplevel component input:

inputs = {
  holochain-versions.url = "github:holochain/holochain?dir=versions/0_1";

  holochain-flake.url = "github:holochain/holochain";
  holochain-flake.inputs.versions.follows = "holochain-versions";

  holochain-flake.inputs.holochain.url = "github:holochain/holochain/holochain-0.1.5-beta-rc.0";
};

please see the following examples to learn more about common and more specific use cases:

• specifying custom component versions

Customizing the holochain binary build parameters

The top-level flake output packages.holochain and devShells.holonix are customisable by means of nixpkgs.lib.makeOverridable.

Example: pass --features chc to holochain's cargo build command

This means that you can pass e.g. holochain.override { cargoExtraArgs = " --feature chc"; } or any other desirable attribute to override the attributes that are passed to craneLib.buildPackage.

In a devShell based on holonix, this can be achieved by specifying holonix.override { holochainOverrides = { cargoExtraArgs = "--features chc"; }}. Please see this flake for a complete example.