Use resource=True with pathto

alabaster/layout.html

@@ -2,9 +2,9 @@
 
 {%- block extrahead %}
   {{ super() }}
-  <link rel="stylesheet" href="{{ pathto('_static/custom.css', 1) }}" type="text/css" />
+  <link rel="stylesheet" href="{{ pathto('_static/custom.css', resource=True) }}" type="text/css" />
   {% if theme_touch_icon %}
-    <link rel="apple-touch-icon" href="{{ pathto('_static/' ~ theme_touch_icon, 1) }}" />
+    <link rel="apple-touch-icon" href="{{ pathto('_static/' ~ theme_touch_icon, resource=True) }}" />
   {% endif %}
 
   {# Deprecated in favor of html_baseurl (pageurl). This is already set in the basic theme #}
@@ -95,7 +95,7 @@
       {% endif %}
       {%- if show_source and has_source and sourcename %}
       {% if show_copyright or show_sphinx %}|{% endif %}
-      <a href="{{ pathto('_sources/' + sourcename, true)|e }}"
+      <a href="{{ pathto('_sources/' + sourcename, resource=True)|e }}"
           rel="nofollow">{{ _('Page source') }}</a>
       {%- endif %}
     </div>