nixpkgs/doc/functions/prefer-remote-fetch.xml
Jörg Thalheim eac6797380
prefer-fetch-remote: an overlay to fetch on remote builders
This is useful when running tools like NixOps or nix-review
on workstations where the upload to the builder is significantly
slower then downloading the source on the builder itself.
2019-01-18 14:41:10 +00:00

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<section xmlns="http://docbook.org/ns/docbook"
xmlns:xlink="http://www.w3.org/1999/xlink"
xmlns:xi="http://www.w3.org/2001/xinclude"
xml:id="sec-prefer-remote-fetch">
<title>prefer-remote-fetch overlay</title>
<para>
<function>prefer-remote-fetch</function> is an overlay that download sources
on remote builder. This is useful when the evaluating machine has a slow
upload while the builder can fetch faster directly from the source.
To use it, put the following snippet as a new overlay:
<programlisting>
self: super:
(super.prefer-remote-fetch self super)
</programlisting>
A full configuration example for that sets the overlay up for your own account,
could look like this
<programlisting>
$ mkdir ~/.config/nixpkgs/overlays/
$ cat &gt; ~/.config/nixpkgs/overlays/prefer-remote-fetch.nix &lt;&lt;EOF
self: super: super.prefer-remote-fetch self super
EOF
</programlisting>
</para>
</section>