.\" -*- mode: troff; coding: utf-8 -*-
.TH "nix3-build" "1" ""
.RS
.PP
\fBWarning\fR 
.br
This program is
\fB\fBexperimental\fR\fR
and its interface is subject to change.
.RE
.SH
Name
.LP
\f(CRnix build\fR - build a derivation or fetch a store path
.SH
Synopsis
.LP
\f(CRnix build\fR [\fIoption\fR\[u2026]] \fIinstallables\fR\[u2026]
.SH
Examples
.IP "\(bu" 3
Build the default package from the flake in the current directory:
.LP
.EX
# nix build
.EE
.IP "\(bu" 3
Build and run GNU Hello from the \f(CRnixpkgs\fR flake:
.LP
.EX
# nix build nixpkgs#hello
# ./result/bin/hello
Hello, world!
.EE
.IP "\(bu" 3
Build GNU Hello and Cowsay, leaving two result symlinks:
.LP
.EX
# nix build nixpkgs#hello nixpkgs#cowsay
# ls -l result*
lrwxrwxrwx 1 … result -> /nix/store/v5sv61sszx301i0x6xysaqzla09nksnd-hello-2.10
lrwxrwxrwx 1 … result-1 -> /nix/store/rkfrm0z6x6jmi7d3gsmma4j53h15mg33-cowsay-3.03+dfsg2
.EE
.IP "\(bu" 3
Build GNU Hello and print the resulting store path.
.LP
.EX
# nix build nixpkgs#hello --print-out-paths
/nix/store/v5sv61sszx301i0x6xysaqzla09nksnd-hello-2.10
.EE
.IP "\(bu" 3
Build a specific output:
.LP
.EX
# nix build nixpkgs#glibc.dev
# ls -ld ./result-dev
lrwxrwxrwx 1 … ./result-dev -> /nix/store/dkm3gwl0xrx0wrw6zi5x3px3lpgjhlw4-glibc-2.32-dev
.EE
.IP "\(bu" 3
Build attribute \f(CRbuild.x86_64-linux\fR from (non-flake) Nix expression
\f(CRrelease.nix\fR:
.LP
.EX
# nix build --file release.nix build.x86_64-linux
.EE
.IP "\(bu" 3
Build a NixOS system configuration from a flake, and make a profile
point to the result:
.LP
.EX
# nix build --profile /nix/var/nix/profiles/system \e
  \(ti/my-configurations#nixosConfigurations.machine.config.system.build.toplevel
.EE
.IP
(This is essentially what \f(CRnixos-rebuild\fR does.)
.IP "\(bu" 3
Build an expression specified on the command line:
.LP
.EX
# nix build --impure --expr \e
  'with import <nixpkgs> {};
   runCommand \(dqfoo\(dq {
     buildInputs = [ hello ];
   }
   \(dqhello > $out\(dq'
# cat ./result
Hello, world!
.EE
.IP
Note that \f(CR--impure\fR is needed because we\(cqre using \f(CR<nixpkgs>\fR,
which relies on the \f(CR$NIX_PATH\fR environment variable.
.IP "\(bu" 3
Fetch a store path from the configured substituters, if it doesn\(cqt
already exist:
.LP
.EX
# nix build /nix/store/rkfrm0z6x6jmi7d3gsmma4j53h15mg33-cowsay-3.03+dfsg2
.EE
.SH
Description
.LP
\f(CRnix build\fR builds the specified \fIinstallables\fR. \fBInstallables\fR that
resolve to derivations are built (or substituted if possible). Store
path installables are substituted.
.PP
Unless \f(CR--no-link\fR is specified, after a successful build, it creates
symlinks to the store paths of the installables. These symlinks have
the prefix \f(CR./result\fR by default; this can be overridden using the
\f(CR--out-link\fR option. Each symlink has a suffix \f(CR-<N>-<outname>\fR, where
\fIN\fR is the index of the installable (with the left-most installable
having index 0), and \fIoutname\fR is the symbolic derivation output name
(e.g. \f(CRbin\fR, \f(CRdev\fR or \f(CRlib\fR). \f(CR-<N>\fR is omitted if \fIN\fR = 0, and
\f(CR-<outname>\fR is omitted if \fIoutname\fR = \f(CRout\fR (denoting the default
output).
.SH
Options
.IP "\(bu" 3
\fB\f(CR--dry-run\fR\fR
.IP
Show what this command would do without doing it.
.IP "\(bu" 3
\fB\f(CR--json\fR\fR
.IP
Produce output in JSON format, suitable for consumption by another program.
.IP "\(bu" 3
\fB\f(CR--no-link\fR\fR
.IP
Do not create symlinks to the build results.
.IP "\(bu" 3
\fB\f(CR--out-link\fR\fR / \f(CR-o\fR \fIpath\fR
.IP
Use \fIpath\fR as prefix for the symlinks to the build results. It defaults to \f(CRresult\fR.
.IP "\(bu" 3
\fB\f(CR--print-out-paths\fR\fR
.IP
Print the resulting output paths
.IP "\(bu" 3
\fB\f(CR--profile\fR\fR \fIpath\fR
.IP
The profile to operate on.
.IP "\(bu" 3
\fB\f(CR--rebuild\fR\fR
.IP
Rebuild an already built package and compare the result to the existing store paths.
.IP "\(bu" 3
\fB\f(CR--stdin\fR\fR
.IP
Read installables from the standard input. No default installable applied.
.LP
\fBCommon evaluation options:\fR
.IP "\(bu" 3
\fB\f(CR--arg\fR\fR \fIname\fR \fIexpr\fR
.IP
Pass the value \fIexpr\fR as the argument \fIname\fR to Nix functions.
.IP "\(bu" 3
\fB\f(CR--argstr\fR\fR \fIname\fR \fIstring\fR
.IP
Pass the string \fIstring\fR as the argument \fIname\fR to Nix functions.
.IP "\(bu" 3
\fB\f(CR--debugger\fR\fR
.IP
Start an interactive environment if evaluation fails.
.IP "\(bu" 3
\fB\f(CR--eval-store\fR\fR \fIstore-url\fR
.IP
The \fBURL of the Nix store\fR
to use for evaluation, i.e. to store derivations (\f(CR.drv\fR files) and inputs referenced by them.
.IP "\(bu" 3
\fB\f(CR--impure\fR\fR
.IP
Allow access to mutable paths and repositories.
.IP "\(bu" 3
\fB\f(CR--include\fR\fR / \f(CR-I\fR \fIpath\fR
.IP
Add \fIpath\fR to the Nix search path. The Nix search path is
initialized from the colon-separated \fB\f(CRNIX_PATH\fR\fR environment
variable, and is used to look up the location of Nix expressions using \fBpaths\fR enclosed in angle
brackets (i.e., \f(CR<nixpkgs>\fR).
.IP
For instance, passing
.LP
.EX
-I /home/eelco/Dev
-I /etc/nixos
.EE
.IP
will cause Nix to look for paths relative to \f(CR/home/eelco/Dev\fR and
\f(CR/etc/nixos\fR, in that order. This is equivalent to setting the
\f(CRNIX_PATH\fR environment variable to
.LP
.EX
/home/eelco/Dev:/etc/nixos
.EE
.IP
It is also possible to match paths against a prefix. For example,
passing
.LP
.EX
-I nixpkgs=/home/eelco/Dev/nixpkgs-branch
-I /etc/nixos
.EE
.IP
will cause Nix to search for \f(CR<nixpkgs/path>\fR in
\f(CR/home/eelco/Dev/nixpkgs-branch/path\fR and \f(CR/etc/nixos/nixpkgs/path\fR.
.IP
If a path in the Nix search path starts with \f(CRhttp://\fR or \f(CRhttps://\fR,
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
.LP
.EX
-I nixpkgs=https://github.com/NixOS/nixpkgs/archive/master.tar.gz
.EE
.IP
tells Nix to download and use the current contents of the \f(CRmaster\fR
branch in the \f(CRnixpkgs\fR repository.
.IP
The URLs of the tarballs from the official \f(CRnixos.org\fR channels
(see \fBthe manual page for \f(CRnix-channel\fR\fR) can be
abbreviated as \f(CRchannel:<channel-name>\fR. For instance, the
following two flags are equivalent:
.LP
.EX
-I nixpkgs=channel:nixos-21.05
-I nixpkgs=https://nixos.org/channels/nixos-21.05/nixexprs.tar.xz
.EE
.IP
You can also fetch source trees using \fBflake URLs\fR and add them to the
search path. For instance,
.LP
.EX
-I nixpkgs=flake:nixpkgs
.EE
.IP
specifies that the prefix \f(CRnixpkgs\fR shall refer to the source tree
downloaded from the \f(CRnixpkgs\fR entry in the flake registry. Similarly,
.LP
.EX
-I nixpkgs=flake:github:NixOS/nixpkgs/nixos-22.05
.EE
.IP
makes \f(CR<nixpkgs>\fR refer to a particular branch of the
\f(CRNixOS/nixpkgs\fR repository on GitHub.
.IP "\(bu" 3
\fB\f(CR--override-flake\fR\fR \fIoriginal-ref\fR \fIresolved-ref\fR
.IP
Override the flake registries, redirecting \fIoriginal-ref\fR to \fIresolved-ref\fR.
.LP
\fBCommon flake-related options:\fR
.IP "\(bu" 3
\fB\f(CR--commit-lock-file\fR\fR
.IP
Commit changes to the flake\(cqs lock file.
.IP "\(bu" 3
\fB\f(CR--inputs-from\fR\fR \fIflake-url\fR
.IP
Use the inputs of the specified flake as registry entries.
.IP "\(bu" 3
\fB\f(CR--no-registries\fR\fR
.IP
Don\(cqt allow lookups in the flake registries. This option is deprecated; use \f(CR--no-use-registries\fR.
.IP "\(bu" 3
\fB\f(CR--no-update-lock-file\fR\fR
.IP
Do not allow any updates to the flake\(cqs lock file.
.IP "\(bu" 3
\fB\f(CR--no-write-lock-file\fR\fR
.IP
Do not write the flake\(cqs newly generated lock file.
.IP "\(bu" 3
\fB\f(CR--output-lock-file\fR\fR \fIflake-lock-path\fR
.IP
Write the given lock file instead of \f(CRflake.lock\fR within the top-level flake.
.IP "\(bu" 3
\fB\f(CR--override-input\fR\fR \fIinput-path\fR \fIflake-url\fR
.IP
Override a specific flake input (e.g. \f(CRdwarffs/nixpkgs\fR). This implies \f(CR--no-write-lock-file\fR.
.IP "\(bu" 3
\fB\f(CR--recreate-lock-file\fR\fR
.IP
Recreate the flake\(cqs lock file from scratch.
.IP "\(bu" 3
\fB\f(CR--reference-lock-file\fR\fR \fIflake-lock-path\fR
.IP
Read the given lock file instead of \f(CRflake.lock\fR within the top-level flake.
.IP "\(bu" 3
\fB\f(CR--update-input\fR\fR \fIinput-path\fR
.IP
Update a specific flake input (ignoring its previous entry in the lock file).
.LP
\fBLogging-related options:\fR
.IP "\(bu" 3
\fB\f(CR--debug\fR\fR
.IP
Set the logging verbosity level to \(oqdebug\(cq.
.IP "\(bu" 3
\fB\f(CR--log-format\fR\fR \fIformat\fR
.IP
Set the format of log output; one of \f(CRraw\fR, \f(CRinternal-json\fR, \f(CRbar\fR or \f(CRbar-with-logs\fR.
.IP "\(bu" 3
\fB\f(CR--print-build-logs\fR\fR / \f(CR-L\fR
.IP
Print full build logs on standard error.
.IP "\(bu" 3
\fB\f(CR--quiet\fR\fR
.IP
Decrease the logging verbosity level.
.IP "\(bu" 3
\fB\f(CR--verbose\fR\fR / \f(CR-v\fR
.IP
Increase the logging verbosity level.
.LP
\fBMiscellaneous global options:\fR
.IP "\(bu" 3
\fB\f(CR--help\fR\fR
.IP
Show usage information.
.IP "\(bu" 3
\fB\f(CR--offline\fR\fR
.IP
Disable substituters and consider all previously downloaded files up-to-date.
.IP "\(bu" 3
\fB\f(CR--option\fR\fR \fIname\fR \fIvalue\fR
.IP
Set the Nix configuration setting \fIname\fR to \fIvalue\fR (overriding \f(CRnix.conf\fR).
.IP "\(bu" 3
\fB\f(CR--refresh\fR\fR
.IP
Consider all previously downloaded files out-of-date.
.IP "\(bu" 3
\fB\f(CR--repair\fR\fR
.IP
During evaluation, rewrite missing or corrupted files in the Nix store. During building, rebuild missing or corrupted store paths.
.IP "\(bu" 3
\fB\f(CR--version\fR\fR
.IP
Show version information.
.LP
\fBOptions that change the interpretation of \fBinstallables\fB:\fR
.IP "\(bu" 3
\fB\f(CR--expr\fR\fR \fIexpr\fR
.IP
Interpret \fB\fIinstallables\fR\fR as attribute paths relative to the Nix expression \fIexpr\fR.
.IP "\(bu" 3
\fB\f(CR--file\fR\fR / \f(CR-f\fR \fIfile\fR
.IP
Interpret \fB\fIinstallables\fR\fR as attribute paths relative to the Nix expression stored in \fIfile\fR. If \fIfile\fR is the character -, then a Nix expression will be read from standard input. Implies \f(CR--impure\fR.
.LP
\fBOptions to override configuration settings:\fR
.IP "\(bu" 3
\fB\f(CR--accept-flake-config\fR\fR
.IP
Enable the \f(CRaccept-flake-config\fR setting.
.IP "\(bu" 3
\fB\f(CR--access-tokens\fR\fR \fIvalue\fR
.IP
Set the \f(CRaccess-tokens\fR setting.
.IP "\(bu" 3
\fB\f(CR--allow-dirty\fR\fR
.IP
Enable the \f(CRallow-dirty\fR setting.
.IP "\(bu" 3
\fB\f(CR--allow-import-from-derivation\fR\fR
.IP
Enable the \f(CRallow-import-from-derivation\fR setting.
.IP "\(bu" 3
\fB\f(CR--allow-new-privileges\fR\fR
.IP
Enable the \f(CRallow-new-privileges\fR setting.
.IP "\(bu" 3
\fB\f(CR--allow-symlinked-store\fR\fR
.IP
Enable the \f(CRallow-symlinked-store\fR setting.
.IP "\(bu" 3
\fB\f(CR--allow-unsafe-native-code-during-evaluation\fR\fR
.IP
Enable the \f(CRallow-unsafe-native-code-during-evaluation\fR setting.
.IP "\(bu" 3
\fB\f(CR--allowed-impure-host-deps\fR\fR \fIvalue\fR
.IP
Set the \f(CRallowed-impure-host-deps\fR setting.
.IP "\(bu" 3
\fB\f(CR--allowed-uris\fR\fR \fIvalue\fR
.IP
Set the \f(CRallowed-uris\fR setting.
.IP "\(bu" 3
\fB\f(CR--allowed-users\fR\fR \fIvalue\fR
.IP
Set the \f(CRallowed-users\fR setting.
.IP "\(bu" 3
\fB\f(CR--auto-allocate-uids\fR\fR
.IP
Enable the \f(CRauto-allocate-uids\fR setting.
.IP "\(bu" 3
\fB\f(CR--auto-optimise-store\fR\fR
.IP
Enable the \f(CRauto-optimise-store\fR setting.
.IP "\(bu" 3
\fB\f(CR--bash-prompt\fR\fR \fIvalue\fR
.IP
Set the \f(CRbash-prompt\fR setting.
.IP "\(bu" 3
\fB\f(CR--bash-prompt-prefix\fR\fR \fIvalue\fR
.IP
Set the \f(CRbash-prompt-prefix\fR setting.
.IP "\(bu" 3
\fB\f(CR--bash-prompt-suffix\fR\fR \fIvalue\fR
.IP
Set the \f(CRbash-prompt-suffix\fR setting.
.IP "\(bu" 3
\fB\f(CR--build-hook\fR\fR \fIvalue\fR
.IP
Set the \f(CRbuild-hook\fR setting.
.IP "\(bu" 3
\fB\f(CR--build-poll-interval\fR\fR \fIvalue\fR
.IP
Set the \f(CRbuild-poll-interval\fR setting.
.IP "\(bu" 3
\fB\f(CR--build-users-group\fR\fR \fIvalue\fR
.IP
Set the \f(CRbuild-users-group\fR setting.
.IP "\(bu" 3
\fB\f(CR--builders\fR\fR \fIvalue\fR
.IP
Set the \f(CRbuilders\fR setting.
.IP "\(bu" 3
\fB\f(CR--builders-use-substitutes\fR\fR
.IP
Enable the \f(CRbuilders-use-substitutes\fR setting.
.IP "\(bu" 3
\fB\f(CR--commit-lockfile-summary\fR\fR \fIvalue\fR
.IP
Set the \f(CRcommit-lockfile-summary\fR setting.
.IP "\(bu" 3
\fB\f(CR--compress-build-log\fR\fR
.IP
Enable the \f(CRcompress-build-log\fR setting.
.IP "\(bu" 3
\fB\f(CR--connect-timeout\fR\fR \fIvalue\fR
.IP
Set the \f(CRconnect-timeout\fR setting.
.IP "\(bu" 3
\fB\f(CR--cores\fR\fR \fIvalue\fR
.IP
Set the \f(CRcores\fR setting.
.IP "\(bu" 3
\fB\f(CR--diff-hook\fR\fR \fIvalue\fR
.IP
Set the \f(CRdiff-hook\fR setting.
.IP "\(bu" 3
\fB\f(CR--download-attempts\fR\fR \fIvalue\fR
.IP
Set the \f(CRdownload-attempts\fR setting.
.IP "\(bu" 3
\fB\f(CR--download-speed\fR\fR \fIvalue\fR
.IP
Set the \f(CRdownload-speed\fR setting.
.IP "\(bu" 3
\fB\f(CR--eval-cache\fR\fR
.IP
Enable the \f(CReval-cache\fR setting.
.IP "\(bu" 3
\fB\f(CR--experimental-features\fR\fR \fIvalue\fR
.IP
Set the \f(CRexperimental-features\fR setting.
.IP "\(bu" 3
\fB\f(CR--extra-access-tokens\fR\fR \fIvalue\fR
.IP
Append to the \f(CRaccess-tokens\fR setting.
.IP "\(bu" 3
\fB\f(CR--extra-allowed-impure-host-deps\fR\fR \fIvalue\fR
.IP
Append to the \f(CRallowed-impure-host-deps\fR setting.
.IP "\(bu" 3
\fB\f(CR--extra-allowed-uris\fR\fR \fIvalue\fR
.IP
Append to the \f(CRallowed-uris\fR setting.
.IP "\(bu" 3
\fB\f(CR--extra-allowed-users\fR\fR \fIvalue\fR
.IP
Append to the \f(CRallowed-users\fR setting.
.IP "\(bu" 3
\fB\f(CR--extra-build-hook\fR\fR \fIvalue\fR
.IP
Append to the \f(CRbuild-hook\fR setting.
.IP "\(bu" 3
\fB\f(CR--extra-experimental-features\fR\fR \fIvalue\fR
.IP
Append to the \f(CRexperimental-features\fR setting.
.IP "\(bu" 3
\fB\f(CR--extra-extra-platforms\fR\fR \fIvalue\fR
.IP
Append to the \f(CRextra-platforms\fR setting.
.IP "\(bu" 3
\fB\f(CR--extra-hashed-mirrors\fR\fR \fIvalue\fR
.IP
Append to the \f(CRhashed-mirrors\fR setting.
.IP "\(bu" 3
\fB\f(CR--extra-ignored-acls\fR\fR \fIvalue\fR
.IP
Append to the \f(CRignored-acls\fR setting.
.IP "\(bu" 3
\fB\f(CR--extra-nix-path\fR\fR \fIvalue\fR
.IP
Append to the \f(CRnix-path\fR setting.
.IP "\(bu" 3
\fB\f(CR--extra-platforms\fR\fR \fIvalue\fR
.IP
Set the \f(CRextra-platforms\fR setting.
.IP "\(bu" 3
\fB\f(CR--extra-plugin-files\fR\fR \fIvalue\fR
.IP
Append to the \f(CRplugin-files\fR setting.
.IP "\(bu" 3
\fB\f(CR--extra-sandbox-paths\fR\fR \fIvalue\fR
.IP
Append to the \f(CRsandbox-paths\fR setting.
.IP "\(bu" 3
\fB\f(CR--extra-secret-key-files\fR\fR \fIvalue\fR
.IP
Append to the \f(CRsecret-key-files\fR setting.
.IP "\(bu" 3
\fB\f(CR--extra-substituters\fR\fR \fIvalue\fR
.IP
Append to the \f(CRsubstituters\fR setting.
.IP "\(bu" 3
\fB\f(CR--extra-system-features\fR\fR \fIvalue\fR
.IP
Append to the \f(CRsystem-features\fR setting.
.IP "\(bu" 3
\fB\f(CR--extra-trusted-public-keys\fR\fR \fIvalue\fR
.IP
Append to the \f(CRtrusted-public-keys\fR setting.
.IP "\(bu" 3
\fB\f(CR--extra-trusted-substituters\fR\fR \fIvalue\fR
.IP
Append to the \f(CRtrusted-substituters\fR setting.
.IP "\(bu" 3
\fB\f(CR--extra-trusted-users\fR\fR \fIvalue\fR
.IP
Append to the \f(CRtrusted-users\fR setting.
.IP "\(bu" 3
\fB\f(CR--fallback\fR\fR
.IP
Enable the \f(CRfallback\fR setting.
.IP "\(bu" 3
\fB\f(CR--filter-syscalls\fR\fR
.IP
Enable the \f(CRfilter-syscalls\fR setting.
.IP "\(bu" 3
\fB\f(CR--flake-registry\fR\fR \fIvalue\fR
.IP
Set the \f(CRflake-registry\fR setting.
.IP "\(bu" 3
\fB\f(CR--fsync-metadata\fR\fR
.IP
Enable the \f(CRfsync-metadata\fR setting.
.IP "\(bu" 3
\fB\f(CR--gc-reserved-space\fR\fR \fIvalue\fR
.IP
Set the \f(CRgc-reserved-space\fR setting.
.IP "\(bu" 3
\fB\f(CR--hashed-mirrors\fR\fR \fIvalue\fR
.IP
Set the \f(CRhashed-mirrors\fR setting.
.IP "\(bu" 3
\fB\f(CR--http-connections\fR\fR \fIvalue\fR
.IP
Set the \f(CRhttp-connections\fR setting.
.IP "\(bu" 3
\fB\f(CR--http2\fR\fR
.IP
Enable the \f(CRhttp2\fR setting.
.IP "\(bu" 3
\fB\f(CR--id-count\fR\fR \fIvalue\fR
.IP
Set the \f(CRid-count\fR setting.
.IP "\(bu" 3
\fB\f(CR--ignore-try\fR\fR
.IP
Enable the \f(CRignore-try\fR setting.
.IP "\(bu" 3
\fB\f(CR--ignored-acls\fR\fR \fIvalue\fR
.IP
Set the \f(CRignored-acls\fR setting.
.IP "\(bu" 3
\fB\f(CR--impersonate-linux-26\fR\fR
.IP
Enable the \f(CRimpersonate-linux-26\fR setting.
.IP "\(bu" 3
\fB\f(CR--keep-build-log\fR\fR
.IP
Enable the \f(CRkeep-build-log\fR setting.
.IP "\(bu" 3
\fB\f(CR--keep-derivations\fR\fR
.IP
Enable the \f(CRkeep-derivations\fR setting.
.IP "\(bu" 3
\fB\f(CR--keep-env-derivations\fR\fR
.IP
Enable the \f(CRkeep-env-derivations\fR setting.
.IP "\(bu" 3
\fB\f(CR--keep-failed\fR\fR
.IP
Enable the \f(CRkeep-failed\fR setting.
.IP "\(bu" 3
\fB\f(CR--keep-going\fR\fR
.IP
Enable the \f(CRkeep-going\fR setting.
.IP "\(bu" 3
\fB\f(CR--keep-outputs\fR\fR
.IP
Enable the \f(CRkeep-outputs\fR setting.
.IP "\(bu" 3
\fB\f(CR--log-lines\fR\fR \fIvalue\fR
.IP
Set the \f(CRlog-lines\fR setting.
.IP "\(bu" 3
\fB\f(CR--max-build-log-size\fR\fR \fIvalue\fR
.IP
Set the \f(CRmax-build-log-size\fR setting.
.IP "\(bu" 3
\fB\f(CR--max-free\fR\fR \fIvalue\fR
.IP
Set the \f(CRmax-free\fR setting.
.IP "\(bu" 3
\fB\f(CR--max-jobs\fR\fR \fIvalue\fR
.IP
Set the \f(CRmax-jobs\fR setting.
.IP "\(bu" 3
\fB\f(CR--max-silent-time\fR\fR \fIvalue\fR
.IP
Set the \f(CRmax-silent-time\fR setting.
.IP "\(bu" 3
\fB\f(CR--max-substitution-jobs\fR\fR \fIvalue\fR
.IP
Set the \f(CRmax-substitution-jobs\fR setting.
.IP "\(bu" 3
\fB\f(CR--min-free\fR\fR \fIvalue\fR
.IP
Set the \f(CRmin-free\fR setting.
.IP "\(bu" 3
\fB\f(CR--min-free-check-interval\fR\fR \fIvalue\fR
.IP
Set the \f(CRmin-free-check-interval\fR setting.
.IP "\(bu" 3
\fB\f(CR--nar-buffer-size\fR\fR \fIvalue\fR
.IP
Set the \f(CRnar-buffer-size\fR setting.
.IP "\(bu" 3
\fB\f(CR--narinfo-cache-negative-ttl\fR\fR \fIvalue\fR
.IP
Set the \f(CRnarinfo-cache-negative-ttl\fR setting.
.IP "\(bu" 3
\fB\f(CR--narinfo-cache-positive-ttl\fR\fR \fIvalue\fR
.IP
Set the \f(CRnarinfo-cache-positive-ttl\fR setting.
.IP "\(bu" 3
\fB\f(CR--netrc-file\fR\fR \fIvalue\fR
.IP
Set the \f(CRnetrc-file\fR setting.
.IP "\(bu" 3
\fB\f(CR--nix-path\fR\fR \fIvalue\fR
.IP
Set the \f(CRnix-path\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-accept-flake-config\fR\fR
.IP
Disable the \f(CRaccept-flake-config\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-allow-dirty\fR\fR
.IP
Disable the \f(CRallow-dirty\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-allow-import-from-derivation\fR\fR
.IP
Disable the \f(CRallow-import-from-derivation\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-allow-new-privileges\fR\fR
.IP
Disable the \f(CRallow-new-privileges\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-allow-symlinked-store\fR\fR
.IP
Disable the \f(CRallow-symlinked-store\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-allow-unsafe-native-code-during-evaluation\fR\fR
.IP
Disable the \f(CRallow-unsafe-native-code-during-evaluation\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-auto-allocate-uids\fR\fR
.IP
Disable the \f(CRauto-allocate-uids\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-auto-optimise-store\fR\fR
.IP
Disable the \f(CRauto-optimise-store\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-builders-use-substitutes\fR\fR
.IP
Disable the \f(CRbuilders-use-substitutes\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-compress-build-log\fR\fR
.IP
Disable the \f(CRcompress-build-log\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-eval-cache\fR\fR
.IP
Disable the \f(CReval-cache\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-fallback\fR\fR
.IP
Disable the \f(CRfallback\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-filter-syscalls\fR\fR
.IP
Disable the \f(CRfilter-syscalls\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-fsync-metadata\fR\fR
.IP
Disable the \f(CRfsync-metadata\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-http2\fR\fR
.IP
Disable the \f(CRhttp2\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-ignore-try\fR\fR
.IP
Disable the \f(CRignore-try\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-impersonate-linux-26\fR\fR
.IP
Disable the \f(CRimpersonate-linux-26\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-keep-build-log\fR\fR
.IP
Disable the \f(CRkeep-build-log\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-keep-derivations\fR\fR
.IP
Disable the \f(CRkeep-derivations\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-keep-env-derivations\fR\fR
.IP
Disable the \f(CRkeep-env-derivations\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-keep-failed\fR\fR
.IP
Disable the \f(CRkeep-failed\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-keep-going\fR\fR
.IP
Disable the \f(CRkeep-going\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-keep-outputs\fR\fR
.IP
Disable the \f(CRkeep-outputs\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-preallocate-contents\fR\fR
.IP
Disable the \f(CRpreallocate-contents\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-print-missing\fR\fR
.IP
Disable the \f(CRprint-missing\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-pure-eval\fR\fR
.IP
Disable the \f(CRpure-eval\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-require-drop-supplementary-groups\fR\fR
.IP
Disable the \f(CRrequire-drop-supplementary-groups\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-require-sigs\fR\fR
.IP
Disable the \f(CRrequire-sigs\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-restrict-eval\fR\fR
.IP
Disable the \f(CRrestrict-eval\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-run-diff-hook\fR\fR
.IP
Disable the \f(CRrun-diff-hook\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-sandbox\fR\fR
.IP
Disable sandboxing.
.IP "\(bu" 3
\fB\f(CR--no-sandbox-fallback\fR\fR
.IP
Disable the \f(CRsandbox-fallback\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-show-trace\fR\fR
.IP
Disable the \f(CRshow-trace\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-substitute\fR\fR
.IP
Disable the \f(CRsubstitute\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-sync-before-registering\fR\fR
.IP
Disable the \f(CRsync-before-registering\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-trace-function-calls\fR\fR
.IP
Disable the \f(CRtrace-function-calls\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-trace-verbose\fR\fR
.IP
Disable the \f(CRtrace-verbose\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-use-case-hack\fR\fR
.IP
Disable the \f(CRuse-case-hack\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-use-cgroups\fR\fR
.IP
Disable the \f(CRuse-cgroups\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-use-registries\fR\fR
.IP
Disable the \f(CRuse-registries\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-use-sqlite-wal\fR\fR
.IP
Disable the \f(CRuse-sqlite-wal\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-use-xdg-base-directories\fR\fR
.IP
Disable the \f(CRuse-xdg-base-directories\fR setting.
.IP "\(bu" 3
\fB\f(CR--no-warn-dirty\fR\fR
.IP
Disable the \f(CRwarn-dirty\fR setting.
.IP "\(bu" 3
\fB\f(CR--plugin-files\fR\fR \fIvalue\fR
.IP
Set the \f(CRplugin-files\fR setting.
.IP "\(bu" 3
\fB\f(CR--post-build-hook\fR\fR \fIvalue\fR
.IP
Set the \f(CRpost-build-hook\fR setting.
.IP "\(bu" 3
\fB\f(CR--pre-build-hook\fR\fR \fIvalue\fR
.IP
Set the \f(CRpre-build-hook\fR setting.
.IP "\(bu" 3
\fB\f(CR--preallocate-contents\fR\fR
.IP
Enable the \f(CRpreallocate-contents\fR setting.
.IP "\(bu" 3
\fB\f(CR--print-missing\fR\fR
.IP
Enable the \f(CRprint-missing\fR setting.
.IP "\(bu" 3
\fB\f(CR--pure-eval\fR\fR
.IP
Enable the \f(CRpure-eval\fR setting.
.IP "\(bu" 3
\fB\f(CR--relaxed-sandbox\fR\fR
.IP
Enable sandboxing, but allow builds to disable it.
.IP "\(bu" 3
\fB\f(CR--require-drop-supplementary-groups\fR\fR
.IP
Enable the \f(CRrequire-drop-supplementary-groups\fR setting.
.IP "\(bu" 3
\fB\f(CR--require-sigs\fR\fR
.IP
Enable the \f(CRrequire-sigs\fR setting.
.IP "\(bu" 3
\fB\f(CR--restrict-eval\fR\fR
.IP
Enable the \f(CRrestrict-eval\fR setting.
.IP "\(bu" 3
\fB\f(CR--run-diff-hook\fR\fR
.IP
Enable the \f(CRrun-diff-hook\fR setting.
.IP "\(bu" 3
\fB\f(CR--sandbox\fR\fR
.IP
Enable sandboxing.
.IP "\(bu" 3
\fB\f(CR--sandbox-build-dir\fR\fR \fIvalue\fR
.IP
Set the \f(CRsandbox-build-dir\fR setting.
.IP "\(bu" 3
\fB\f(CR--sandbox-dev-shm-size\fR\fR \fIvalue\fR
.IP
Set the \f(CRsandbox-dev-shm-size\fR setting.
.IP "\(bu" 3
\fB\f(CR--sandbox-fallback\fR\fR
.IP
Enable the \f(CRsandbox-fallback\fR setting.
.IP "\(bu" 3
\fB\f(CR--sandbox-paths\fR\fR \fIvalue\fR
.IP
Set the \f(CRsandbox-paths\fR setting.
.IP "\(bu" 3
\fB\f(CR--secret-key-files\fR\fR \fIvalue\fR
.IP
Set the \f(CRsecret-key-files\fR setting.
.IP "\(bu" 3
\fB\f(CR--show-trace\fR\fR
.IP
Enable the \f(CRshow-trace\fR setting.
.IP "\(bu" 3
\fB\f(CR--ssl-cert-file\fR\fR \fIvalue\fR
.IP
Set the \f(CRssl-cert-file\fR setting.
.IP "\(bu" 3
\fB\f(CR--stalled-download-timeout\fR\fR \fIvalue\fR
.IP
Set the \f(CRstalled-download-timeout\fR setting.
.IP "\(bu" 3
\fB\f(CR--start-id\fR\fR \fIvalue\fR
.IP
Set the \f(CRstart-id\fR setting.
.IP "\(bu" 3
\fB\f(CR--store\fR\fR \fIvalue\fR
.IP
Set the \f(CRstore\fR setting.
.IP "\(bu" 3
\fB\f(CR--substitute\fR\fR
.IP
Enable the \f(CRsubstitute\fR setting.
.IP "\(bu" 3
\fB\f(CR--substituters\fR\fR \fIvalue\fR
.IP
Set the \f(CRsubstituters\fR setting.
.IP "\(bu" 3
\fB\f(CR--sync-before-registering\fR\fR
.IP
Enable the \f(CRsync-before-registering\fR setting.
.IP "\(bu" 3
\fB\f(CR--system\fR\fR \fIvalue\fR
.IP
Set the \f(CRsystem\fR setting.
.IP "\(bu" 3
\fB\f(CR--system-features\fR\fR \fIvalue\fR
.IP
Set the \f(CRsystem-features\fR setting.
.IP "\(bu" 3
\fB\f(CR--tarball-ttl\fR\fR \fIvalue\fR
.IP
Set the \f(CRtarball-ttl\fR setting.
.IP "\(bu" 3
\fB\f(CR--timeout\fR\fR \fIvalue\fR
.IP
Set the \f(CRtimeout\fR setting.
.IP "\(bu" 3
\fB\f(CR--trace-function-calls\fR\fR
.IP
Enable the \f(CRtrace-function-calls\fR setting.
.IP "\(bu" 3
\fB\f(CR--trace-verbose\fR\fR
.IP
Enable the \f(CRtrace-verbose\fR setting.
.IP "\(bu" 3
\fB\f(CR--trusted-public-keys\fR\fR \fIvalue\fR
.IP
Set the \f(CRtrusted-public-keys\fR setting.
.IP "\(bu" 3
\fB\f(CR--trusted-substituters\fR\fR \fIvalue\fR
.IP
Set the \f(CRtrusted-substituters\fR setting.
.IP "\(bu" 3
\fB\f(CR--trusted-users\fR\fR \fIvalue\fR
.IP
Set the \f(CRtrusted-users\fR setting.
.IP "\(bu" 3
\fB\f(CR--use-case-hack\fR\fR
.IP
Enable the \f(CRuse-case-hack\fR setting.
.IP "\(bu" 3
\fB\f(CR--use-cgroups\fR\fR
.IP
Enable the \f(CRuse-cgroups\fR setting.
.IP "\(bu" 3
\fB\f(CR--use-registries\fR\fR
.IP
Enable the \f(CRuse-registries\fR setting.
.IP "\(bu" 3
\fB\f(CR--use-sqlite-wal\fR\fR
.IP
Enable the \f(CRuse-sqlite-wal\fR setting.
.IP "\(bu" 3
\fB\f(CR--use-xdg-base-directories\fR\fR
.IP
Enable the \f(CRuse-xdg-base-directories\fR setting.
.IP "\(bu" 3
\fB\f(CR--user-agent-suffix\fR\fR \fIvalue\fR
.IP
Set the \f(CRuser-agent-suffix\fR setting.
.IP "\(bu" 3
\fB\f(CR--warn-dirty\fR\fR
.IP
Enable the \f(CRwarn-dirty\fR setting.