Warning
This program is experimental and its interface is subject to change.
Name
nix registry pin
- pin a flake to its current version or to the current version of a flake URL
Synopsis
nix registry pin
[option...] url locked
Examples
-
Pin
nixpkgs
to its most recent Git revision:# nix registry pin nixpkgs
Afterwards the user registry will have an entry like this:
nix registry list | grep '^user ' user flake:nixpkgs github:NixOS/nixpkgs/925b70cd964ceaedee26fde9b19cc4c4f081196a
and
nix flake info
will say:# nix flake info nixpkgs Resolved URL: github:NixOS/nixpkgs/925b70cd964ceaedee26fde9b19cc4c4f081196a Locked URL: github:NixOS/nixpkgs/925b70cd964ceaedee26fde9b19cc4c4f081196a …
-
Pin
nixpkgs
in a custom registry to its most recent Git revision:# nix registry pin --registry ./custom-flake-registry.json nixpkgs
Description
This command adds an entry to the user registry that maps flake reference url to the corresponding locked flake reference, that is, a flake reference that specifies an exact revision or content hash. This ensures that until this registry entry is removed, all uses of url will resolve to exactly the same flake.
Entries can be removed using nix registry remove
.
Options
-
--registry
registryThe registry to operate on.
Common evaluation options
-
--arg
name exprPass the value expr as the argument name to Nix functions.
-
--arg-from-file
name pathPass the contents of file path as the argument name to Nix functions.
-
--arg-from-stdin
namePass the contents of stdin as the argument name to Nix functions.
-
--argstr
name stringPass the string string as the argument name to Nix functions.
-
Start an interactive environment if evaluation fails.
-
--eval-store
store-urlThe URL of the Nix store to use for evaluation, i.e. to store derivations (
.drv
files) and inputs referenced by them. -
Allow access to mutable paths and repositories.
-
--include
/-I
pathAdd path to the Nix search path. The Nix search path is initialized from the colon-separated
NIX_PATH
environment variable, and is used to look up the location of Nix expressions using paths enclosed in angle brackets (i.e.,<nixpkgs>
).For instance, passing
-I /home/eelco/Dev -I /etc/nixos
will cause Nix to look for paths relative to
/home/eelco/Dev
and/etc/nixos
, in that order. This is equivalent to setting theNIX_PATH
environment variable to/home/eelco/Dev:/etc/nixos
It is also possible to match paths against a prefix. For example, passing
-I nixpkgs=/home/eelco/Dev/nixpkgs-branch -I /etc/nixos
will cause Nix to search for
<nixpkgs/path>
in/home/eelco/Dev/nixpkgs-branch/path
and/etc/nixos/nixpkgs/path
.If a path in the Nix search path starts with
http://
orhttps://
, it is interpreted as the URL of a tarball that will be downloaded and unpacked to a temporary location. The tarball must consist of a single top-level directory. For example, passing-I nixpkgs=https://github.com/NixOS/nixpkgs/archive/master.tar.gz
tells Nix to download and use the current contents of the
master
branch in thenixpkgs
repository.The URLs of the tarballs from the official
nixos.org
channels (see the manual page fornix-channel
) can be abbreviated aschannel:<channel-name>
. For instance, the following two flags are equivalent:-I nixpkgs=channel:nixos-21.05 -I nixpkgs=https://nixos.org/channels/nixos-21.05/nixexprs.tar.xz
You can also fetch source trees using flake URLs and add them to the search path. For instance,
-I nixpkgs=flake:nixpkgs
specifies that the prefix
nixpkgs
shall refer to the source tree downloaded from thenixpkgs
entry in the flake registry. Similarly,-I nixpkgs=flake:github:NixOS/nixpkgs/nixos-22.05
makes
<nixpkgs>
refer to a particular branch of theNixOS/nixpkgs
repository on GitHub. -
--override-flake
original-ref resolved-refOverride the flake registries, redirecting original-ref to resolved-ref.
Logging-related options
-
Set the logging verbosity level to 'debug'.
-
--log-format
formatSet the format of log output; one of
raw
,internal-json
,bar
orbar-with-logs
. -
--print-build-logs
/-L
Print full build logs on standard error.
-
Decrease the logging verbosity level.
-
--verbose
/-v
Increase the logging verbosity level.
Miscellaneous global options
-
Show usage information.
-
Disable substituters and consider all previously downloaded files up-to-date.
-
--option
name valueSet the Nix configuration setting name to value (overriding
nix.conf
). -
Consider all previously downloaded files out-of-date.
-
During evaluation, rewrite missing or corrupted files in the Nix store. During building, rebuild missing or corrupted store paths.
-
Show version information.
Note
See
man nix.conf
for overriding configuration settings with command line flags.