nix3-edit(1)

Warning: This program is experimental and its interface is subject to change.

Name
nix edit - open the Nix expression of a Nix package in $EDITOR

Synopsis
nix edit [option…] installable

Examples

•   Open the Nix expression of the GNU Hello package:

    # nix edit nixpkgs#hello

•   Get the filename and line number used by nix edit:

    # nix eval --raw nixpkgs#hello.meta.position
    /nix/store/fvafw0gvwayzdan642wrv84pzm5bgpmy-source/pkgs/applications/misc/hello/default.nix:15

Description
This command opens the Nix expression of a derivation in an editor. The filename and line number of the derivation are taken from its meta.position attribute. Nixpkgs’ stdenv.mkDerivation sets this attribute to the location of the definition of the meta.description, version or name derivation attributes.

The editor to invoke is specified by the EDITOR environment variable. It defaults to cat. If the editor is emacs, nano or vim, it is passed the line number of the derivation using the argument +<lineno>.

Options
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:

•   --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.