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Document allowSubstitutes

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Eelco Dolstra 2018-11-07 11:42:22 +01:00
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commit 5a3f140856
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doc/manual/expressions/advanced-attributes.xml
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@ -322,6 +322,20 @@ big = "a very long string";
</varlistentry>
<varlistentry><term><varname>allowSubstitutes</varname></term>
<listitem><para>If this attribute is set to
<literal>false</literal>, then Nix will always build this
derivation; it will not try to substitute its outputs. This is
useful for very trivial derivations (such as
<function>writeText</function> in Nixpkgs) that are cheaper to
build locally than to substitute from a binary
cache.</para></listitem>
</varlistentry>
</variablelist>
</section>