nix3-nar-cat(1) General Commands Manual nix3-nar-cat(1)

Warning
This program is experimental and its interface is subject to change.

nix nar cat - print the contents of a file inside a NAR file on stdout

nix nar cat [option…] nar path

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List a file in a NAR and pipe it through gunzip:
# nix nar cat ./hello.nar /share/man/man1/hello.1.gz | gunzip
.\" DO NOT MODIFY THIS FILE!  It was generated by help2man 1.46.4.
.TH HELLO "1" "November 2014" "hello 2.10" "User Commands"
…

This command prints on standard output the contents of the regular file path inside the NAR file nar.

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--debug
Set the logging verbosity level to ‘debug’.
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--log-format format
Set the format of log output; one of raw, internal-json, bar or bar-with-logs.
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--print-build-logs / -L
Print full build logs on standard error.
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--quiet
Decrease the logging verbosity level.
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--verbose / -v
Increase the logging verbosity level.

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--help
Show usage information.
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--offline
Disable substituters and consider all previously downloaded files up-to-date.
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--option name value
Set the Nix configuration setting name to value (overriding nix.conf).
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--refresh
Consider all previously downloaded files out-of-date.
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--version
Show version information.

Note

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