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24 lines
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<chapter xmlns="http://docbook.org/ns/docbook"
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xmlns:xlink="http://www.w3.org/1999/xlink"
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xmlns:xi="http://www.w3.org/2001/XInclude"
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version="5.0"
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xml:id="ch-env-variables">
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<title>Environment Variables</title>
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<para>To use Nix, some environment variables should be set. In
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particular, <envar>PATH</envar> should contain the directories
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<filename><replaceable>prefix</replaceable>/bin</filename> and
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<filename>~/.nix-profile/bin</filename>. The first directory contains
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the Nix tools themselves, while <filename>~/.nix-profile</filename> is
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a symbolic link to the current <emphasis>user environment</emphasis>
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(an automatically generated package consisting of symlinks to
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installed packages). The simplest way to set the required environment
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variables is to include the file
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<filename><replaceable>prefix</replaceable>/etc/profile.d/nix.sh</filename>
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in your <filename>~/.profile</filename> (or similar), like this:</para>
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<screen>
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source <replaceable>prefix</replaceable>/etc/profile.d/nix.sh</screen>
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</chapter>
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