Warning
This program is experimental and its interface is subject to change.
Name
nix store prefetch-file - download a file into the Nix store
Synopsis
nix store prefetch-file [option...] url
Examples
-
Download a file to the Nix store:
# nix store prefetch-file https://releases.nixos.org/nix/nix-2.3.10/nix-2.3.10.tar.xz Downloaded 'https://releases.nixos.org/nix/nix-2.3.10/nix-2.3.10.tar.xz' to '/nix/store/vbdbi42hgnc4h7pyqzp6h2yf77kw93aw-source' (hash 'sha256-qKheVd5D0BervxMDbt+1hnTKE2aRWC8XCAwc0SeHt6s='). -
Download a file and get the SHA-512 hash:
# nix store prefetch-file --json --hash-type sha512 \ https://releases.nixos.org/nix/nix-2.3.10/nix-2.3.10.tar.xz \ | jq -r .hash sha512-6XJxfym0TNH9knxeH4ZOvns6wElFy3uahunl2hJgovACCMEMXSy42s69zWVyGJALXTI+86tpDJGlIcAySEKBbA==
Description
This command downloads the file url to the Nix store. It prints out the resulting store path and the cryptographic hash of the contents of the file.
The name component of the store path defaults to the last component of
url, but this can be overridden using --name.
Options
-
--executableMake the resulting file executable. Note that this causes the resulting hash to be a NAR hash rather than a flat file hash. -
--expected-hashhash The expected hash of the file. -
--hash-typehash-algo hash algorithm ('md5', 'sha1', 'sha256', or 'sha512') -
--jsonProduce output in JSON format, suitable for consumption by another program. -
--namename Override the name component of the resulting store path. It defaults to the base name of url.
Logging-related options:
-
--debugSet the logging verbosity level to 'debug'. -
--log-formatformat Set the format of log output; one ofraw,internal-json,barorbar-with-logs. -
--print-build-logs/-LPrint full build logs on standard error. -
--quietDecrease the logging verbosity level. -
--verbose/-vIncrease the logging verbosity level.
Miscellaneous global options:
-
--helpShow usage information. -
--offlineDisable substituters and consider all previously downloaded files up-to-date. -
--optionname value Set the Nix configuration setting name to value (overridingnix.conf). -
--refreshConsider all previously downloaded files out-of-date. -
--versionShow version information.
Options to override configuration settings:
-
--accept-flake-configEnable theaccept-flake-configsetting. -
--access-tokensvalue Set theaccess-tokenssetting. -
--allow-dirtyEnable theallow-dirtysetting. -
--allow-import-from-derivationEnable theallow-import-from-derivationsetting. -
--allow-new-privilegesEnable theallow-new-privilegessetting. -
--allow-symlinked-storeEnable theallow-symlinked-storesetting. -
--allow-unsafe-native-code-during-evaluationEnable theallow-unsafe-native-code-during-evaluationsetting. -
--allowed-impure-host-depsvalue Set theallowed-impure-host-depssetting. -
--allowed-urisvalue Set theallowed-urissetting. -
--allowed-usersvalue Set theallowed-userssetting. -
--auto-allocate-uidsEnable theauto-allocate-uidssetting. -
--auto-optimise-storeEnable theauto-optimise-storesetting. -
--bash-promptvalue Set thebash-promptsetting. -
--bash-prompt-prefixvalue Set thebash-prompt-prefixsetting. -
--bash-prompt-suffixvalue Set thebash-prompt-suffixsetting. -
--build-hookvalue Set thebuild-hooksetting. -
--build-poll-intervalvalue Set thebuild-poll-intervalsetting. -
--build-users-groupvalue Set thebuild-users-groupsetting. -
--buildersvalue Set thebuilderssetting. -
--builders-use-substitutesEnable thebuilders-use-substitutessetting. -
--commit-lockfile-summaryvalue Set thecommit-lockfile-summarysetting. -
--compress-build-logEnable thecompress-build-logsetting. -
--connect-timeoutvalue Set theconnect-timeoutsetting. -
--coresvalue Set thecoressetting. -
--diff-hookvalue Set thediff-hooksetting. -
--download-attemptsvalue Set thedownload-attemptssetting. -
--download-speedvalue Set thedownload-speedsetting. -
--eval-cacheEnable theeval-cachesetting. -
--experimental-featuresvalue Set theexperimental-featuressetting. -
--extra-access-tokensvalue Append to theaccess-tokenssetting. -
--extra-allowed-impure-host-depsvalue Append to theallowed-impure-host-depssetting. -
--extra-allowed-urisvalue Append to theallowed-urissetting. -
--extra-allowed-usersvalue Append to theallowed-userssetting. -
--extra-build-hookvalue Append to thebuild-hooksetting. -
--extra-experimental-featuresvalue Append to theexperimental-featuressetting. -
--extra-extra-platformsvalue Append to theextra-platformssetting. -
--extra-hashed-mirrorsvalue Append to thehashed-mirrorssetting. -
--extra-ignored-aclsvalue Append to theignored-aclssetting. -
--extra-nix-pathvalue Append to thenix-pathsetting. -
--extra-platformsvalue Set theextra-platformssetting. -
--extra-plugin-filesvalue Append to theplugin-filessetting. -
--extra-sandbox-pathsvalue Append to thesandbox-pathssetting. -
--extra-secret-key-filesvalue Append to thesecret-key-filessetting. -
--extra-substitutersvalue Append to thesubstituterssetting. -
--extra-system-featuresvalue Append to thesystem-featuressetting. -
--extra-trusted-public-keysvalue Append to thetrusted-public-keyssetting. -
--extra-trusted-substitutersvalue Append to thetrusted-substituterssetting. -
--extra-trusted-usersvalue Append to thetrusted-userssetting. -
--fallbackEnable thefallbacksetting. -
--filter-syscallsEnable thefilter-syscallssetting. -
--flake-registryvalue Set theflake-registrysetting. -
--fsync-metadataEnable thefsync-metadatasetting. -
--gc-reserved-spacevalue Set thegc-reserved-spacesetting. -
--hashed-mirrorsvalue Set thehashed-mirrorssetting. -
--http-connectionsvalue Set thehttp-connectionssetting. -
--http2Enable thehttp2setting. -
--id-countvalue Set theid-countsetting. -
--ignore-tryEnable theignore-trysetting. -
--ignored-aclsvalue Set theignored-aclssetting. -
--impersonate-linux-26Enable theimpersonate-linux-26setting. -
--keep-build-logEnable thekeep-build-logsetting. -
--keep-derivationsEnable thekeep-derivationssetting. -
--keep-env-derivationsEnable thekeep-env-derivationssetting. -
--keep-failedEnable thekeep-failedsetting. -
--keep-goingEnable thekeep-goingsetting. -
--keep-outputsEnable thekeep-outputssetting. -
--log-linesvalue Set thelog-linessetting. -
--max-build-log-sizevalue Set themax-build-log-sizesetting. -
--max-freevalue Set themax-freesetting. -
--max-jobsvalue Set themax-jobssetting. -
--max-silent-timevalue Set themax-silent-timesetting. -
--max-substitution-jobsvalue Set themax-substitution-jobssetting. -
--min-freevalue Set themin-freesetting. -
--min-free-check-intervalvalue Set themin-free-check-intervalsetting. -
--nar-buffer-sizevalue Set thenar-buffer-sizesetting. -
--narinfo-cache-negative-ttlvalue Set thenarinfo-cache-negative-ttlsetting. -
--narinfo-cache-positive-ttlvalue Set thenarinfo-cache-positive-ttlsetting. -
--netrc-filevalue Set thenetrc-filesetting. -
--nix-pathvalue Set thenix-pathsetting. -
--no-accept-flake-configDisable theaccept-flake-configsetting. -
--no-allow-dirtyDisable theallow-dirtysetting. -
--no-allow-import-from-derivationDisable theallow-import-from-derivationsetting. -
--no-allow-new-privilegesDisable theallow-new-privilegessetting. -
--no-allow-symlinked-storeDisable theallow-symlinked-storesetting. -
--no-allow-unsafe-native-code-during-evaluationDisable theallow-unsafe-native-code-during-evaluationsetting. -
--no-auto-allocate-uidsDisable theauto-allocate-uidssetting. -
--no-auto-optimise-storeDisable theauto-optimise-storesetting. -
--no-builders-use-substitutesDisable thebuilders-use-substitutessetting. -
--no-compress-build-logDisable thecompress-build-logsetting. -
--no-eval-cacheDisable theeval-cachesetting. -
--no-fallbackDisable thefallbacksetting. -
--no-filter-syscallsDisable thefilter-syscallssetting. -
--no-fsync-metadataDisable thefsync-metadatasetting. -
--no-http2Disable thehttp2setting. -
--no-ignore-tryDisable theignore-trysetting. -
--no-impersonate-linux-26Disable theimpersonate-linux-26setting. -
--no-keep-build-logDisable thekeep-build-logsetting. -
--no-keep-derivationsDisable thekeep-derivationssetting. -
--no-keep-env-derivationsDisable thekeep-env-derivationssetting. -
--no-keep-failedDisable thekeep-failedsetting. -
--no-keep-goingDisable thekeep-goingsetting. -
--no-keep-outputsDisable thekeep-outputssetting. -
--no-preallocate-contentsDisable thepreallocate-contentssetting. -
--no-print-missingDisable theprint-missingsetting. -
--no-pure-evalDisable thepure-evalsetting. -
--no-require-drop-supplementary-groupsDisable therequire-drop-supplementary-groupssetting. -
--no-require-sigsDisable therequire-sigssetting. -
--no-restrict-evalDisable therestrict-evalsetting. -
--no-run-diff-hookDisable therun-diff-hooksetting. -
--no-sandboxDisable sandboxing. -
--no-sandbox-fallbackDisable thesandbox-fallbacksetting. -
--no-show-traceDisable theshow-tracesetting. -
--no-substituteDisable thesubstitutesetting. -
--no-sync-before-registeringDisable thesync-before-registeringsetting. -
--no-trace-function-callsDisable thetrace-function-callssetting. -
--no-trace-verboseDisable thetrace-verbosesetting. -
--no-use-case-hackDisable theuse-case-hacksetting. -
--no-use-cgroupsDisable theuse-cgroupssetting. -
--no-use-registriesDisable theuse-registriessetting. -
--no-use-sqlite-walDisable theuse-sqlite-walsetting. -
--no-use-xdg-base-directoriesDisable theuse-xdg-base-directoriessetting. -
--no-warn-dirtyDisable thewarn-dirtysetting. -
--plugin-filesvalue Set theplugin-filessetting. -
--post-build-hookvalue Set thepost-build-hooksetting. -
--pre-build-hookvalue Set thepre-build-hooksetting. -
--preallocate-contentsEnable thepreallocate-contentssetting. -
--print-missingEnable theprint-missingsetting. -
--pure-evalEnable thepure-evalsetting. -
--relaxed-sandboxEnable sandboxing, but allow builds to disable it. -
--require-drop-supplementary-groupsEnable therequire-drop-supplementary-groupssetting. -
--require-sigsEnable therequire-sigssetting. -
--restrict-evalEnable therestrict-evalsetting. -
--run-diff-hookEnable therun-diff-hooksetting. -
--sandboxEnable sandboxing. -
--sandbox-build-dirvalue Set thesandbox-build-dirsetting. -
--sandbox-dev-shm-sizevalue Set thesandbox-dev-shm-sizesetting. -
--sandbox-fallbackEnable thesandbox-fallbacksetting. -
--sandbox-pathsvalue Set thesandbox-pathssetting. -
--secret-key-filesvalue Set thesecret-key-filessetting. -
--show-traceEnable theshow-tracesetting. -
--ssl-cert-filevalue Set thessl-cert-filesetting. -
--stalled-download-timeoutvalue Set thestalled-download-timeoutsetting. -
--start-idvalue Set thestart-idsetting. -
--storevalue Set thestoresetting. -
--substituteEnable thesubstitutesetting. -
--substitutersvalue Set thesubstituterssetting. -
--sync-before-registeringEnable thesync-before-registeringsetting. -
--systemvalue Set thesystemsetting. -
--system-featuresvalue Set thesystem-featuressetting. -
--tarball-ttlvalue Set thetarball-ttlsetting. -
--timeoutvalue Set thetimeoutsetting. -
--trace-function-callsEnable thetrace-function-callssetting. -
--trace-verboseEnable thetrace-verbosesetting. -
--trusted-public-keysvalue Set thetrusted-public-keyssetting. -
--trusted-substitutersvalue Set thetrusted-substituterssetting. -
--trusted-usersvalue Set thetrusted-userssetting. -
--use-case-hackEnable theuse-case-hacksetting. -
--use-cgroupsEnable theuse-cgroupssetting. -
--use-registriesEnable theuse-registriessetting. -
--use-sqlite-walEnable theuse-sqlite-walsetting. -
--use-xdg-base-directoriesEnable theuse-xdg-base-directoriessetting. -
--user-agent-suffixvalue Set theuser-agent-suffixsetting. -
--warn-dirtyEnable thewarn-dirtysetting.