Warning: This program is experimental and its interface is subject to change.
nix copy - copy paths between Nix stores
nix copy [option...] installables...
Copy Firefox from the local store to a binary cache in
# nix copy --to file:///tmp/cache $(type -p firefox)
file://- without this, the destination is a chroot store, not a binary cache.
Copy the entire current NixOS system closure to another machine via SSH:
# nix copy -s --to ssh://server /run/current-system
-sflag causes the remote machine to try to substitute missing store paths, which may be faster if the link between the local and remote machines is slower than the link between the remote machine and its substituters (e.g.
Copy a closure from another machine via SSH:
# nix copy --from ssh://server /nix/store/a6cnl93nk1wxnq84brbbwr6hxw9gp2w9-blender-2.79-rc2
Copy Hello to a binary cache in an Amazon S3 bucket:
# nix copy --to s3://my-bucket?region=eu-west-1 nixpkgs#hello
or to an S3-compatible storage system:
# nix copy --to s3://my-bucket?region=eu-west-1&endpoint=example.com nixpkgs#hello
Note that this only works if Nix is built with AWS support.
Copy a closure from
/nix/storeto the chroot store
# nix copy --to /tmp/nix nixpkgs#hello --no-check-sigs
nix copy copies store path closures between two Nix stores. The
source store is specified using
--from and the destination using
--to. If one of these is omitted, it defaults to the local store.
start an interactive environment if evaluation fails
URL of the source Nix store.
Do not require that paths are signed by trusted keys.
Whether to try substitutes on the destination store (only supported by SSH stores).
URL of the destination Nix store.
Common evaluation options:
Pass the value expr as the argument name to Nix functions.
Pass the string string as the argument name to Nix functions.
The Nix store to use for evaluations.
Allow access to mutable paths and repositories.
Add path to the list of locations used to look up
Override the flake registries, redirecting original-ref to resolved-ref.
Common flake-related options:
Commit changes to the flake's lock file.
Use the inputs of the specified flake as registry entries.
Don't allow lookups in the flake registries. This option is deprecated; use
Do not allow any updates to the flake's lock file.
Do not write the flake's newly generated lock file.
Override a specific flake input (e.g.
dwarffs/nixpkgs). This implies
Recreate the flake's lock file from scratch.
Update a specific flake input (ignoring its previous entry in the lock file).
Options that change the interpretation of installables:
Apply the operation to every store path.
Operate on the store derivation rather than its outputs.
Interpret installables as attribute paths relative to the Nix expression expr.
Interpret installables as attribute paths relative to the Nix expression stored in file. If file is the character -, then a Nix expression will be read from standard input. Implies
Apply operation to specified paths only.