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<xsl:if test="position() != last()">.</xsl:if>
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<para>
<emphasis>Default:</emphasis>
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<xsl:apply-templates select="attr[@name = 'default']" />
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none
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<emphasis>Example:</emphasis>
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repository (if it’s a module and we have a revision number),
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<!-- Print the filename and make it user-friendly by replacing the
/nix/store/<hash> prefix by the default location of nixos
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