Dummy Store

Store URL format: dummy://

This store type represents a store that contains no store paths and cannot be written to. It's useful when you want to use the Nix evaluator when no actual Nix store exists, e.g.

# nix eval --store dummy:// --expr '1 + 2'

Settings

• path-info-cache-size

  Size of the in-memory store path metadata cache.

  Default: 65536

• priority

  Priority of this store when used as a substituter. A lower value means a higher priority.

  Default: 0

• store

  Logical location of the Nix store, usually /nix/store. Note that you can only copy store paths between stores if they have the same store setting.

  Default: /nix/store

• system-features

  Optional system features available on the system this store uses to build derivations.

  Example: "kvm"

  Default: machine-specific

• trusted

  Whether paths from this store can be used as substitutes even if they are not signed by a key listed in the trusted-public-keys setting.

  Default: false

• want-mass-query

  Whether this store can be queried efficiently for path validity when used as a substituter.

  Default: false