* component -> package.
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<refsection><title>Description</title>
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<para>The command <command>nix-env</command> is used to manipulate Nix
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user environments. User environments are sets of software components
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user environments. User environments are sets of software packages
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available to a user at some point in time. In other words, they are a
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synthesised view of the programs available in the Nix store. There
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may be many user environments: different users can have different
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@ -750,35 +750,35 @@ user environment elements, etc. -->
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<listitem><para>Compare installed versions to available versions,
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or vice versa (if <option>--available</option> is given). This is
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useful for quickly seeing whether upgrades for installed
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components are available in a Nix expression. A column is added
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packages are available in a Nix expression. A column is added
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with the following meaning:
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<variablelist>
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<varlistentry><term><literal><</literal> <replaceable>version</replaceable></term>
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<listitem><para>A newer version of the component is available
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<listitem><para>A newer version of the package is available
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or installed.</para></listitem>
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</varlistentry>
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<varlistentry><term><literal>=</literal> <replaceable>version</replaceable></term>
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<listitem><para>At most the same version of the component is
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<listitem><para>At most the same version of the package is
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available or installed.</para></listitem>
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</varlistentry>
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<varlistentry><term><literal>></literal> <replaceable>version</replaceable></term>
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<listitem><para>Only older versions of the component are
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<listitem><para>Only older versions of the package are
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available or installed.</para></listitem>
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</varlistentry>
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<varlistentry><term><literal>- ?</literal></term>
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<listitem><para>No version of the component is available or
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<listitem><para>No version of the package is available or
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installed.</para></listitem>
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</varlistentry>
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