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Merge pull request #1382 from FRidh/patch-1

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Document fetchTarball can take a sha256
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Eelco Dolstra 2017-05-24 11:07:36 +02:00 committed by GitHub
parent edbb105e98 2b2de5ef6a
commit b303ad012c
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18
doc/manual/expressions/builtins.xml
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@ -298,6 +298,24 @@ with import (fetchTarball https://github.com/NixOS/nixpkgs-channels/archive/nixo
stdenv.mkDerivation { … }
</programlisting>
Note that when obtaining the hash with <varname>nix-prefetch-url
</varname> the option <varname>--unpack</varname> is required.
</para>
<para>This function can also verify the contents against a hash.
In that case, the function takes a set instead of a URL. The set
requires the attribute <varname>url</varname> and the attribute
<varname>sha256</varname>, e.g.
<programlisting>
with import (fetchTarball {
url = https://github.com/NixOS/nixpkgs-channels/archive/nixos-14.12.tar.gz;
sha256 = "1jppksrfvbk5ypiqdz4cddxdl8z6zyzdb2srq8fcffr327ld5jj2";
}) {};
stdenv.mkDerivation { … }
</programlisting>
</para>
<para>This function is not available if <link