toasted-cactus/layouts/partials/nav.html

<nav class="main-nav">
    {{ $url := replace .Permalink ( printf "%s" .Site.BaseURL) "" }}
    {{ if ne $url "" }}
        <a href='{{ .Site.BaseURL }}'> <span class="arrow">←</span>Home</a>
    {{ end }}

    {{ if ne $url "about/" }}
        <a href='{{ .Site.BaseURL }}about'>About</a>
    {{ end }}

    <a class="cta" href="{{ .Site.BaseURL }}index.xml">Subscribe</a>
</nav>