Contents
What are the root channels of NixOS Nix?
Garbage Collector Roots 12. Channels 13. Sharing Packages Between Machines 13.1. Serving a Nix store via HTTP 13.2. Copying Closures Via SSH 13.3. Serving a Nix store via SSH 13.4. Serving a Nix store via AWS S3 or S3-compatible Service 13.4.1.
What does a Nix expression describe in Nix?
A Nix expression describes everything that goes into a package build action (a “derivation”): other packages, sources, the build script, environment variables for the build script, etc. Nix tries very hard to ensure that Nix expressions are deterministic: building a Nix expression twice should yield the same result.
How to add a package to the Nix collection?
To add a package to the Nix Packages collection, you generally need to do three things: Write a Nix expression for the package. This is a file that describes all the inputs involved in building the package, such as dependencies, sources, and so on. Write a builder.
What kind of package manager does NixOS use?
NixOS is a Linux distribution based on Nix. It uses Nix not just for package management but also to manage the system configuration (e.g., to build configuration files in /etc). This means, among other things, that it is easy to roll back the entire configuration of the system to an earlier state.
What’s the difference between nixos rebuild and NixOS build?
While nixos-rebuild build-vm allows to build a vm out of the current system configuration, there is a more light-weight alternative when only a single service needs to be tested. where -I nixpkgs=/path/to/nixpkgs is optionally depending whether the vm should be build from git checkout or a channel.
How to build a VM out of A NixOS profile?
If you use a different profile name the procedure is similar, but use /nix/var/nix/profiles/system-profiles/$profileName instead of /nix/var/nix/profiles/system . While nixos-rebuild build-vm allows to build a vm out of the current system configuration, there is a more light-weight alternative when only a single service needs to be tested.
How to get the Nix source in Debian?
In Debian, apt-get source gets both the patched upstream source and the recipe for the package. Those need two steps in Nix. To find the package’s attribute path: While this is technically possible it will in all likelihood not work. Manage secrets in your (system) configuration.