Name¶

nix show-config - show the Nix configuration or the value of a specific setting

Synopsis¶

nix show-config [option…] name

Options¶

•

--json

Produce output in JSON format, suitable for consumption by another program.

Logging-related options:

•

--debug

Set the logging verbosity level to ‘debug’.

•

--log-format format

Set the format of log output; one of raw, internal-json, bar or bar-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 (overriding nix.conf).

•

--refresh

Consider all previously downloaded files out-of-date.

•

--version

Show version information.

Options to override configuration settings:

•

--accept-flake-config

Enable the accept-flake-config setting.

•

--access-tokens value

Set the access-tokens setting.

•

--allow-dirty

Enable the allow-dirty setting.

•

--allow-import-from-derivation

Enable the allow-import-from-derivation setting.

•

--allow-new-privileges

Enable the allow-new-privileges setting.

•

--allow-symlinked-store

Enable the allow-symlinked-store setting.

•

--allow-unsafe-native-code-during-evaluation

Enable the allow-unsafe-native-code-during-evaluation setting.

•

--allowed-impure-host-deps value

Set the allowed-impure-host-deps setting.

•

--allowed-uris value

Set the allowed-uris setting.

•

--allowed-users value

Set the allowed-users setting.

•

--auto-allocate-uids

Enable the auto-allocate-uids setting.

•

--auto-optimise-store

Enable the auto-optimise-store setting.

•

--bash-prompt value

Set the bash-prompt setting.

•

--bash-prompt-prefix value

Set the bash-prompt-prefix setting.

•

--bash-prompt-suffix value

Set the bash-prompt-suffix setting.

•

--build-hook value

Set the build-hook setting.

•

--build-poll-interval value

Set the build-poll-interval setting.

•

--build-users-group value

Set the build-users-group setting.

•

--builders value

Set the builders setting.

•

--builders-use-substitutes

Enable the builders-use-substitutes setting.

•

--commit-lockfile-summary value

Set the commit-lockfile-summary setting.

•

--compress-build-log

Enable the compress-build-log setting.

•

--connect-timeout value

Set the connect-timeout setting.

•

--cores value

Set the cores setting.

•

--diff-hook value

Set the diff-hook setting.

•

--download-attempts value

Set the download-attempts setting.

•

--download-speed value

Set the download-speed setting.

•

--eval-cache

Enable the eval-cache setting.

•

--experimental-features value

Set the experimental-features setting.

•

--extra-access-tokens value

Append to the access-tokens setting.

•

--extra-allowed-impure-host-deps value

Append to the allowed-impure-host-deps setting.

•

--extra-allowed-uris value

Append to the allowed-uris setting.

•

--extra-allowed-users value

Append to the allowed-users setting.

•

--extra-build-hook value

Append to the build-hook setting.

•

--extra-experimental-features value

Append to the experimental-features setting.

•

--extra-extra-platforms value

Append to the extra-platforms setting.

•

--extra-hashed-mirrors value

Append to the hashed-mirrors setting.

•

--extra-ignored-acls value

Append to the ignored-acls setting.

•

--extra-nix-path value

Append to the nix-path setting.

•

--extra-platforms value

Set the extra-platforms setting.

•

--extra-plugin-files value

Append to the plugin-files setting.

•

--extra-sandbox-paths value

Append to the sandbox-paths setting.

•

--extra-secret-key-files value

Append to the secret-key-files setting.

•

--extra-substituters value

Append to the substituters setting.

•

--extra-system-features value

Append to the system-features setting.

•

--extra-trusted-public-keys value

Append to the trusted-public-keys setting.

•

--extra-trusted-substituters value

Append to the trusted-substituters setting.

•

--extra-trusted-users value

Append to the trusted-users setting.

•

--fallback

Enable the fallback setting.

•

--filter-syscalls

Enable the filter-syscalls setting.

•

--flake-registry value

Set the flake-registry setting.

•

--fsync-metadata

Enable the fsync-metadata setting.

•

--gc-reserved-space value

Set the gc-reserved-space setting.

•

--hashed-mirrors value

Set the hashed-mirrors setting.

•

--http-connections value

Set the http-connections setting.

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--http2

Enable the http2 setting.

•

--id-count value

Set the id-count setting.

•

--ignore-try

Enable the ignore-try setting.

•

--ignored-acls value

Set the ignored-acls setting.

•

--impersonate-linux-26

Enable the impersonate-linux-26 setting.

•

--keep-build-log

Enable the keep-build-log setting.

•

--keep-derivations

Enable the keep-derivations setting.

•

--keep-env-derivations

Enable the keep-env-derivations setting.

•

--keep-failed

Enable the keep-failed setting.

•

--keep-going

Enable the keep-going setting.

•

--keep-outputs

Enable the keep-outputs setting.

•

--log-lines value

Set the log-lines setting.

•

--max-build-log-size value

Set the max-build-log-size setting.

•

--max-free value

Set the max-free setting.

•

--max-jobs value

Set the max-jobs setting.

•

--max-silent-time value

Set the max-silent-time setting.

•

--max-substitution-jobs value

Set the max-substitution-jobs setting.

•

--min-free value

Set the min-free setting.

•

--min-free-check-interval value

Set the min-free-check-interval setting.

•

--nar-buffer-size value

Set the nar-buffer-size setting.

•

--narinfo-cache-negative-ttl value

Set the narinfo-cache-negative-ttl setting.

•

--narinfo-cache-positive-ttl value

Set the narinfo-cache-positive-ttl setting.

•

--netrc-file value

Set the netrc-file setting.

•

--nix-path value

Set the nix-path setting.

•

--no-accept-flake-config

Disable the accept-flake-config setting.

•

--no-allow-dirty

Disable the allow-dirty setting.

•

--no-allow-import-from-derivation

Disable the allow-import-from-derivation setting.

•

--no-allow-new-privileges

Disable the allow-new-privileges setting.

•

--no-allow-symlinked-store

Disable the allow-symlinked-store setting.

•

--no-allow-unsafe-native-code-during-evaluation

Disable the allow-unsafe-native-code-during-evaluation setting.

•

--no-auto-allocate-uids

Disable the auto-allocate-uids setting.

•

--no-auto-optimise-store

Disable the auto-optimise-store setting.

•

--no-builders-use-substitutes

Disable the builders-use-substitutes setting.

•

--no-compress-build-log

Disable the compress-build-log setting.

•

--no-eval-cache

Disable the eval-cache setting.

•

--no-fallback

Disable the fallback setting.

•

--no-filter-syscalls

Disable the filter-syscalls setting.

•

--no-fsync-metadata

Disable the fsync-metadata setting.

•

--no-http2

Disable the http2 setting.

•

--no-ignore-try

Disable the ignore-try setting.

•

--no-impersonate-linux-26

Disable the impersonate-linux-26 setting.

•

--no-keep-build-log

Disable the keep-build-log setting.

•

--no-keep-derivations

Disable the keep-derivations setting.

•

--no-keep-env-derivations

Disable the keep-env-derivations setting.

•

--no-keep-failed

Disable the keep-failed setting.

•

--no-keep-going

Disable the keep-going setting.

•

--no-keep-outputs

Disable the keep-outputs setting.

•

--no-preallocate-contents

Disable the preallocate-contents setting.

•

--no-print-missing

Disable the print-missing setting.

•

--no-pure-eval

Disable the pure-eval setting.

•

--no-require-drop-supplementary-groups

Disable the require-drop-supplementary-groups setting.

•

--no-require-sigs

Disable the require-sigs setting.

•

--no-restrict-eval

Disable the restrict-eval setting.

•

--no-run-diff-hook

Disable the run-diff-hook setting.

•

--no-sandbox

Disable sandboxing.

•

--no-sandbox-fallback

Disable the sandbox-fallback setting.

•

--no-show-trace

Disable the show-trace setting.

•

--no-substitute

Disable the substitute setting.

•

--no-sync-before-registering

Disable the sync-before-registering setting.

•

--no-trace-function-calls

Disable the trace-function-calls setting.

•

--no-trace-verbose

Disable the trace-verbose setting.

•

--no-use-case-hack

Disable the use-case-hack setting.

•

--no-use-cgroups

Disable the use-cgroups setting.

•

--no-use-registries

Disable the use-registries setting.

•

--no-use-sqlite-wal

Disable the use-sqlite-wal setting.

•

--no-use-xdg-base-directories

Disable the use-xdg-base-directories setting.

•

--no-warn-dirty

Disable the warn-dirty setting.

•

--plugin-files value

Set the plugin-files setting.

•

--post-build-hook value

Set the post-build-hook setting.

•

--pre-build-hook value

Set the pre-build-hook setting.

•

--preallocate-contents

Enable the preallocate-contents setting.

•

--print-missing

Enable the print-missing setting.

•

--pure-eval

Enable the pure-eval setting.

•

--relaxed-sandbox

Enable sandboxing, but allow builds to disable it.

•

--require-drop-supplementary-groups

Enable the require-drop-supplementary-groups setting.

•

--require-sigs

Enable the require-sigs setting.

•

--restrict-eval

Enable the restrict-eval setting.

•

--run-diff-hook

Enable the run-diff-hook setting.

•

--sandbox

Enable sandboxing.

•

--sandbox-build-dir value

Set the sandbox-build-dir setting.

•

--sandbox-dev-shm-size value

Set the sandbox-dev-shm-size setting.

•

--sandbox-fallback

Enable the sandbox-fallback setting.

•

--sandbox-paths value

Set the sandbox-paths setting.

•

--secret-key-files value

Set the secret-key-files setting.

•

--show-trace

Enable the show-trace setting.

•

--ssl-cert-file value

Set the ssl-cert-file setting.

•

--stalled-download-timeout value

Set the stalled-download-timeout setting.

•

--start-id value

Set the start-id setting.

•

--store value

Set the store setting.

•

--substitute

Enable the substitute setting.

•

--substituters value

Set the substituters setting.

•

--sync-before-registering

Enable the sync-before-registering setting.

•

--system value

Set the system setting.

•

--system-features value

Set the system-features setting.

•

--tarball-ttl value

Set the tarball-ttl setting.

•

--timeout value

Set the timeout setting.

•

--trace-function-calls

Enable the trace-function-calls setting.

•

--trace-verbose

Enable the trace-verbose setting.

•

--trusted-public-keys value

Set the trusted-public-keys setting.

•

--trusted-substituters value

Set the trusted-substituters setting.

•

--trusted-users value

Set the trusted-users setting.

•

--use-case-hack

Enable the use-case-hack setting.

•

--use-cgroups

Enable the use-cgroups setting.

•

--use-registries

Enable the use-registries setting.

•

--use-sqlite-wal

Enable the use-sqlite-wal setting.

•

--use-xdg-base-directories

Enable the use-xdg-base-directories setting.

•

--user-agent-suffix value

Set the user-agent-suffix setting.

•

--warn-dirty

Enable the warn-dirty setting.