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

       •  --executable

          Make  the  resulting file executable. Note that this causes the resulting hash to be a NAR hash rather
          than a flat file hash.

       •  --expected-hash hash

          The expected hash of the file.

       •  --hash-type hash-algo

          Hash algorithm (md5, sha1, sha256, or sha512).

       •  --json

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

       •  --name name

          Override the name component of the resulting store path. It defaults to the base name of url.

       •  --unpack

          Unpack the archive (which must be a tarball or zip file) and add the result to the Nix store.

   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.

          Note

          See man nix.conf for overriding configuration settings with command line flags.

                                                                                     nix3-store-prefetch-file(1)