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README.md
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@ -18,7 +18,7 @@ or [pin nixpkgs yourself](https://nix.dev/reference/pinning-nixpkgs)
- Allows specifying extra Nix configuration options via `extra_nix_config`
- Allows specifying `$NIX_PATH` and channels via `nix_path`
- Share `/nix/store` between builds using [cachix-action](https://github.com/cachix/cachix-action) for simple binary cache setup to speed up your builds and share binaries with your team
- Enables `flakes` and `nix-command` experimental features by default (to disable, set `experimental-features` via `extra_nix_config`)
- Enables KVM on supported machines: run VMs and NixOS tests with full hardware-acceleration
## Usage
@ -75,6 +75,19 @@ To install Nix from any commit, go to [the corresponding installer_test action](
- `enable_kvm`: whether to enable KVM for hardware-accelerated virtualization on Linux. Enabled by default if available.
## Differences from the default Nix installer
Some settings have been optimised for use in CI environments:
- `nix.conf` settings:
- The experimental `flakes` and `nix-command` features are enabled. Disable by overriding `experimental-features` in `extra_nix_config`.
- `always-allow-substitutes` is set to `true`. Disable by overriding `always-allow-substitutes` in `extra_nix_config`.
- KVM is enabled if available. Disable by setting `enable_kvm: false`.
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## FAQ