<refentry 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-nix-pull"> <refmeta> <refentrytitle>nix-pull</refentrytitle> <manvolnum>1</manvolnum> <refmiscinfo class="source">Nix</refmiscinfo> <refmiscinfo class="version"><xi:include href="version.txt" parse="text"/></refmiscinfo> </refmeta> <refnamediv> <refname>nix-pull</refname> <refpurpose>pull substitutes from a network cache</refpurpose> </refnamediv> <refsynopsisdiv> <cmdsynopsis> <command>nix-pull</command> <arg choice='plain'><replaceable>url</replaceable></arg> </cmdsynopsis> </refsynopsisdiv> <refsection><title>Description</title> <para>The command <command>nix-pull</command> obtains a list of pre-built store paths from the URL <replaceable>url</replaceable>, and for each of these store paths, registers a substitute derivation that downloads and unpacks it into the Nix store. This is used to speed up installations: if you attempt to install something that has already been built and stored into the network cache, Nix can transparently re-use the pre-built store paths.</para> <para>The file at <replaceable>url</replaceable> must be compatible with the files created by <replaceable>nix-push</replaceable>.</para> </refsection> <refsection><title>Examples</title> <screen> $ nix-pull http://nix.cs.uu.nl/dist/nix/nixpkgs-0.5pre753/MANIFEST</screen> </refsection> </refentry>