groupLayers applies the algorithm described above the its input and returns a list of layers, each consisting of a list of Nix store paths that it should contain.

PackageFromPath returns the name of a Nix package based on its output store path.

Layer represents the data returned for each layer that Nix should build for the container image.

runtimeGraph represents structured information from Nix about the runtime dependencies of a derivation.

Popularity data for each Nix package that was calculated in advance.