Warning
This program is experimental and its interface is subject to change.
Name
nix develop
- run a bash shell that provides the build environment of a derivation
Synopsis
nix develop
[option...] installable
Examples
-
Start a shell with the build environment of the default package of the flake in the current directory:
# nix develop
Typical commands to run inside this shell are:
# configurePhase # buildPhase # installPhase
Alternatively, you can run whatever build tools your project uses directly, e.g. for a typical Unix project:
# ./configure --prefix=$out # make # make install
-
Run a particular build phase directly:
# nix develop --unpack # nix develop --configure # nix develop --build # nix develop --check # nix develop --install # nix develop --installcheck
-
Start a shell with the build environment of GNU Hello:
# nix develop nixpkgs#hello
-
Record a build environment in a profile:
# nix develop --profile /tmp/my-build-env nixpkgs#hello
-
Use a build environment previously recorded in a profile:
# nix develop /tmp/my-build-env
-
Replace all occurrences of the store path corresponding to
glibc.dev
with a writable directory:# nix develop --redirect nixpkgs#glibc.dev ~/my-glibc/outputs/dev
Note that this is useful if you're running a
nix develop
shell fornixpkgs#glibc
in~/my-glibc
and want to compile another package against it. -
Run a series of script commands:
# nix develop --command bash -c "mkdir build && cmake .. && make"
Description
nix develop
starts a bash
shell that provides an interactive build
environment nearly identical to what Nix would use to build
installable. Inside this shell, environment variables and shell
functions are set up so that you can interactively and incrementally
build your package.
Nix determines the build environment by building a modified version of
the derivation installable that just records the environment
initialised by stdenv
and exits. This build environment can be
recorded into a profile using --profile
.
The prompt used by the bash
shell can be customised by setting the
bash-prompt
, bash-prompt-prefix
, and bash-prompt-suffix
settings in
nix.conf
or in the flake's nixConfig
attribute.
Flake output attributes
If no flake output attribute is given, nix develop
tries the following
flake output attributes:
-
devShells.<system>.default
-
packages.<system>.default
If a flake output name is given, nix develop
tries the following flake
output attributes:
-
devShells.<system>.<name>
-
packages.<system>.<name>
-
legacyPackages.<system>.<name>
Options
-
--build
Run thebuild
phase. -
--check
Run thecheck
phase. -
--command
/-c
command args Instead of starting an interactive shell, start the specified command and arguments. -
--configure
Run theconfigure
phase. -
--ignore-environment
/-i
Clear the entire environment (except those specified with--keep
). -
--install
Run theinstall
phase. -
--installcheck
Run theinstallcheck
phase. -
--keep
/-k
name Keep the environment variable name. -
--phase
phase-name The stdenv phase to run (e.g.build
orconfigure
). -
--profile
path The profile to operate on. -
--redirect
installable outputs-dir Redirect a store path to a mutable location. -
--unpack
Run theunpack
phase. -
--unset
/-u
name Unset the environment variable name.
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. -
--debugger
Start an interactive environment if evaluation fails. -
--eval-store
store-url The URL of the Nix store to use for evaluation, i.e. to store derivations (.drv
files) and inputs referenced by them. -
--impure
Allow access to mutable paths and repositories. -
--include
/-I
path Add path to the Nix search path. The Nix search path is initialized from the colon-separatedNIX_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-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. -
--output-lock-file
flake-lock-path Write the given lock file instead offlake.lock
within the top-level flake. -
--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. -
--reference-lock-file
flake-lock-path Read the given lock file instead offlake.lock
within the top-level flake. -
--update-input
input-path Update a specific flake input (ignoring its previous entry in the lock file).
Logging-related options:
-
--debug
Set the logging verbosity level to 'debug'. -
--log-format
format Set the format of log output; one ofraw
,internal-json
,bar
orbar-with-logs
. -
--print-build-logs
/-L
Print full build logs on standard error. -
--quiet
Decrease the logging verbosity level. -
--verbose
/-v
Increase the logging verbosity level.
Miscellaneous global options:
-
--help
Show usage information. -
--offline
Disable substituters and consider all previously downloaded files up-to-date. -
--option
name value Set the Nix configuration setting name to value (overridingnix.conf
). -
--refresh
Consider all previously downloaded files out-of-date. -
--repair
During evaluation, rewrite missing or corrupted files in the Nix store. During building, rebuild missing or corrupted store paths. -
--version
Show version information.
Options that change the interpretation of installables:
-
--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. Implies--impure
.
Options to override configuration settings:
-
--accept-flake-config
Enable theaccept-flake-config
setting. -
--access-tokens
value Set theaccess-tokens
setting. -
--allow-dirty
Enable theallow-dirty
setting. -
--allow-import-from-derivation
Enable theallow-import-from-derivation
setting. -
--allow-new-privileges
Enable theallow-new-privileges
setting. -
--allow-symlinked-store
Enable theallow-symlinked-store
setting. -
--allow-unsafe-native-code-during-evaluation
Enable theallow-unsafe-native-code-during-evaluation
setting. -
--allowed-impure-host-deps
value Set theallowed-impure-host-deps
setting. -
--allowed-uris
value Set theallowed-uris
setting. -
--allowed-users
value Set theallowed-users
setting. -
--auto-allocate-uids
Enable theauto-allocate-uids
setting. -
--auto-optimise-store
Enable theauto-optimise-store
setting. -
--bash-prompt
value Set thebash-prompt
setting. -
--bash-prompt-prefix
value Set thebash-prompt-prefix
setting. -
--bash-prompt-suffix
value Set thebash-prompt-suffix
setting. -
--build-hook
value Set thebuild-hook
setting. -
--build-poll-interval
value Set thebuild-poll-interval
setting. -
--build-users-group
value Set thebuild-users-group
setting. -
--builders
value Set thebuilders
setting. -
--builders-use-substitutes
Enable thebuilders-use-substitutes
setting. -
--commit-lockfile-summary
value Set thecommit-lockfile-summary
setting. -
--compress-build-log
Enable thecompress-build-log
setting. -
--connect-timeout
value Set theconnect-timeout
setting. -
--cores
value Set thecores
setting. -
--diff-hook
value Set thediff-hook
setting. -
--download-attempts
value Set thedownload-attempts
setting. -
--download-speed
value Set thedownload-speed
setting. -
--eval-cache
Enable theeval-cache
setting. -
--experimental-features
value Set theexperimental-features
setting. -
--extra-access-tokens
value Append to theaccess-tokens
setting. -
--extra-allowed-impure-host-deps
value Append to theallowed-impure-host-deps
setting. -
--extra-allowed-uris
value Append to theallowed-uris
setting. -
--extra-allowed-users
value Append to theallowed-users
setting. -
--extra-build-hook
value Append to thebuild-hook
setting. -
--extra-experimental-features
value Append to theexperimental-features
setting. -
--extra-extra-platforms
value Append to theextra-platforms
setting. -
--extra-hashed-mirrors
value Append to thehashed-mirrors
setting. -
--extra-ignored-acls
value Append to theignored-acls
setting. -
--extra-nix-path
value Append to thenix-path
setting. -
--extra-platforms
value Set theextra-platforms
setting. -
--extra-plugin-files
value Append to theplugin-files
setting. -
--extra-sandbox-paths
value Append to thesandbox-paths
setting. -
--extra-secret-key-files
value Append to thesecret-key-files
setting. -
--extra-substituters
value Append to thesubstituters
setting. -
--extra-system-features
value Append to thesystem-features
setting. -
--extra-trusted-public-keys
value Append to thetrusted-public-keys
setting. -
--extra-trusted-substituters
value Append to thetrusted-substituters
setting. -
--extra-trusted-users
value Append to thetrusted-users
setting. -
--fallback
Enable thefallback
setting. -
--filter-syscalls
Enable thefilter-syscalls
setting. -
--flake-registry
value Set theflake-registry
setting. -
--fsync-metadata
Enable thefsync-metadata
setting. -
--gc-reserved-space
value Set thegc-reserved-space
setting. -
--hashed-mirrors
value Set thehashed-mirrors
setting. -
--http-connections
value Set thehttp-connections
setting. -
--http2
Enable thehttp2
setting. -
--id-count
value Set theid-count
setting. -
--ignore-try
Enable theignore-try
setting. -
--ignored-acls
value Set theignored-acls
setting. -
--impersonate-linux-26
Enable theimpersonate-linux-26
setting. -
--keep-build-log
Enable thekeep-build-log
setting. -
--keep-derivations
Enable thekeep-derivations
setting. -
--keep-env-derivations
Enable thekeep-env-derivations
setting. -
--keep-failed
Enable thekeep-failed
setting. -
--keep-going
Enable thekeep-going
setting. -
--keep-outputs
Enable thekeep-outputs
setting. -
--log-lines
value Set thelog-lines
setting. -
--max-build-log-size
value Set themax-build-log-size
setting. -
--max-free
value Set themax-free
setting. -
--max-jobs
value Set themax-jobs
setting. -
--max-silent-time
value Set themax-silent-time
setting. -
--max-substitution-jobs
value Set themax-substitution-jobs
setting. -
--min-free
value Set themin-free
setting. -
--min-free-check-interval
value Set themin-free-check-interval
setting. -
--nar-buffer-size
value Set thenar-buffer-size
setting. -
--narinfo-cache-negative-ttl
value Set thenarinfo-cache-negative-ttl
setting. -
--narinfo-cache-positive-ttl
value Set thenarinfo-cache-positive-ttl
setting. -
--netrc-file
value Set thenetrc-file
setting. -
--nix-path
value Set thenix-path
setting. -
--no-accept-flake-config
Disable theaccept-flake-config
setting. -
--no-allow-dirty
Disable theallow-dirty
setting. -
--no-allow-import-from-derivation
Disable theallow-import-from-derivation
setting. -
--no-allow-new-privileges
Disable theallow-new-privileges
setting. -
--no-allow-symlinked-store
Disable theallow-symlinked-store
setting. -
--no-allow-unsafe-native-code-during-evaluation
Disable theallow-unsafe-native-code-during-evaluation
setting. -
--no-auto-allocate-uids
Disable theauto-allocate-uids
setting. -
--no-auto-optimise-store
Disable theauto-optimise-store
setting. -
--no-builders-use-substitutes
Disable thebuilders-use-substitutes
setting. -
--no-compress-build-log
Disable thecompress-build-log
setting. -
--no-eval-cache
Disable theeval-cache
setting. -
--no-fallback
Disable thefallback
setting. -
--no-filter-syscalls
Disable thefilter-syscalls
setting. -
--no-fsync-metadata
Disable thefsync-metadata
setting. -
--no-http2
Disable thehttp2
setting. -
--no-ignore-try
Disable theignore-try
setting. -
--no-impersonate-linux-26
Disable theimpersonate-linux-26
setting. -
--no-keep-build-log
Disable thekeep-build-log
setting. -
--no-keep-derivations
Disable thekeep-derivations
setting. -
--no-keep-env-derivations
Disable thekeep-env-derivations
setting. -
--no-keep-failed
Disable thekeep-failed
setting. -
--no-keep-going
Disable thekeep-going
setting. -
--no-keep-outputs
Disable thekeep-outputs
setting. -
--no-preallocate-contents
Disable thepreallocate-contents
setting. -
--no-print-missing
Disable theprint-missing
setting. -
--no-pure-eval
Disable thepure-eval
setting. -
--no-require-drop-supplementary-groups
Disable therequire-drop-supplementary-groups
setting. -
--no-require-sigs
Disable therequire-sigs
setting. -
--no-restrict-eval
Disable therestrict-eval
setting. -
--no-run-diff-hook
Disable therun-diff-hook
setting. -
--no-sandbox
Disable sandboxing. -
--no-sandbox-fallback
Disable thesandbox-fallback
setting. -
--no-show-trace
Disable theshow-trace
setting. -
--no-substitute
Disable thesubstitute
setting. -
--no-sync-before-registering
Disable thesync-before-registering
setting. -
--no-trace-function-calls
Disable thetrace-function-calls
setting. -
--no-trace-verbose
Disable thetrace-verbose
setting. -
--no-use-case-hack
Disable theuse-case-hack
setting. -
--no-use-cgroups
Disable theuse-cgroups
setting. -
--no-use-registries
Disable theuse-registries
setting. -
--no-use-sqlite-wal
Disable theuse-sqlite-wal
setting. -
--no-use-xdg-base-directories
Disable theuse-xdg-base-directories
setting. -
--no-warn-dirty
Disable thewarn-dirty
setting. -
--plugin-files
value Set theplugin-files
setting. -
--post-build-hook
value Set thepost-build-hook
setting. -
--pre-build-hook
value Set thepre-build-hook
setting. -
--preallocate-contents
Enable thepreallocate-contents
setting. -
--print-missing
Enable theprint-missing
setting. -
--pure-eval
Enable thepure-eval
setting. -
--relaxed-sandbox
Enable sandboxing, but allow builds to disable it. -
--require-drop-supplementary-groups
Enable therequire-drop-supplementary-groups
setting. -
--require-sigs
Enable therequire-sigs
setting. -
--restrict-eval
Enable therestrict-eval
setting. -
--run-diff-hook
Enable therun-diff-hook
setting. -
--sandbox
Enable sandboxing. -
--sandbox-build-dir
value Set thesandbox-build-dir
setting. -
--sandbox-dev-shm-size
value Set thesandbox-dev-shm-size
setting. -
--sandbox-fallback
Enable thesandbox-fallback
setting. -
--sandbox-paths
value Set thesandbox-paths
setting. -
--secret-key-files
value Set thesecret-key-files
setting. -
--show-trace
Enable theshow-trace
setting. -
--ssl-cert-file
value Set thessl-cert-file
setting. -
--stalled-download-timeout
value Set thestalled-download-timeout
setting. -
--start-id
value Set thestart-id
setting. -
--store
value Set thestore
setting. -
--substitute
Enable thesubstitute
setting. -
--substituters
value Set thesubstituters
setting. -
--sync-before-registering
Enable thesync-before-registering
setting. -
--system
value Set thesystem
setting. -
--system-features
value Set thesystem-features
setting. -
--tarball-ttl
value Set thetarball-ttl
setting. -
--timeout
value Set thetimeout
setting. -
--trace-function-calls
Enable thetrace-function-calls
setting. -
--trace-verbose
Enable thetrace-verbose
setting. -
--trusted-public-keys
value Set thetrusted-public-keys
setting. -
--trusted-substituters
value Set thetrusted-substituters
setting. -
--trusted-users
value Set thetrusted-users
setting. -
--use-case-hack
Enable theuse-case-hack
setting. -
--use-cgroups
Enable theuse-cgroups
setting. -
--use-registries
Enable theuse-registries
setting. -
--use-sqlite-wal
Enable theuse-sqlite-wal
setting. -
--use-xdg-base-directories
Enable theuse-xdg-base-directories
setting. -
--user-agent-suffix
value Set theuser-agent-suffix
setting. -
--warn-dirty
Enable thewarn-dirty
setting.