Warning: This program is experimental and its interface is subject to change.
Name
nix copy
- copy paths between Nix stores
Synopsis
nix copy
[option...] installables...
Examples
-
Copy Firefox from the local store to a binary cache in
/tmp/cache
:# nix copy --to file:///tmp/cache $(type -p firefox)
Note the
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
The
-s
flag 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.https://cache.nixos.org
). -
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/store
to the chroot store/tmp/nix/nix/store
:# nix copy --to /tmp/nix nixpkgs#hello --no-check-sigs
Description
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.
Options
-
--from
store-uri
URL of the source Nix store. -
--no-check-sigs
Do not require that paths are signed by trusted keys. -
--substitute-on-destination
/-s
Whether to try substitutes on the destination store (only supported by SSH stores). -
--to
store-uri
URL of the destination Nix store.
Common evaluation options:
-
--arg
name expr
Pass the value expr as the argument name to Nix functions. -
--argstr
name string
Pass the string string as the argument name to Nix functions. -
--eval-store
store-url
The Nix store to use for evaluations. -
--impure
Allow access to mutable paths and repositories. -
--include
/-I
path
Add path to the list of locations used to look up<...>
file names. -
--override-flake
original-ref resolved-ref
Override the flake registries, redirecting original-ref to resolved-ref.
Common flake-related options:
-
--commit-lock-file
Commit changes to the flake's lock file. -
--inputs-from
flake-url
Use the inputs of the specified flake as registry entries. -
--no-registries
Don't allow lookups in the flake registries. This option is deprecated; use--no-use-registries
. -
--no-update-lock-file
Do not allow any updates to the flake's lock file. -
--no-write-lock-file
Do not write the flake's newly generated lock file. -
--override-input
input-path flake-url
Override a specific flake input (e.g.dwarffs/nixpkgs
). This implies--no-write-lock-file
. -
--recreate-lock-file
Recreate the flake's lock file from scratch. -
--update-input
input-path
Update a specific flake input (ignoring its previous entry in the lock file).
Options that change the interpretation of installables:
-
--all
Apply the operation to every store path. -
--derivation
Operate on the store derivation rather than its outputs. -
--expr
expr
Interpret installables as attribute paths relative to the Nix expression expr. -
--file
/-f
file
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. -
--no-recursive
Apply operation to specified paths only.