* Manual.

doc/manual/installation.xml

@@ -148,6 +148,20 @@ $ rm -rf /nix/var</screen>
 </section>
 
 
+<section><info><title>Upgrading Nix through Nix</title></info>
+
+<para>You can install the latest stable version of Nix through Nix
+itself by subscribing to the channel <link
+xlink:href="http://nix.cs.uu.nl/dist/nix/channels-v3/nix-stable" /> ,
+or the latest unstable version by subscribing to the channel<link
+xlink:href="http://nix.cs.uu.nl/dist/nix/channels-v3/nix-unstable" />.
+You can also do a <link linkend="sec-one-click">one-click
+installation</link> by clicking on the package links at <link
+xlink:href="http://nix.cs.uu.nl/dist/nix/" />.</para>
+
+</section>
+
+
 <section><info><title>Permissions</title></info>
 
 <para>All Nix operations must be performed under the user ID that owns

doc/manual/nix-collect-garbage.xml

@@ -9,6 +9,8 @@
 <refsynopsisdiv>
   <cmdsynopsis>
     <command>nix-collect-garbage</command>
+    <arg><option>--delete-old</option></arg>
+    <arg><option>-d</option></arg>
     <group choice='opt'>
       <arg choice='plain'><option>--print-roots</option></arg>
       <arg choice='plain'><option>--print-live</option></arg>
@@ -20,10 +22,28 @@
 
 <refsection><title>Description</title>
 
-<para>The command <command>nix-collect-garbage</command> is an
-obsolete wrapper around <link
-linkend="rsec-nix-store-gc"><command>nix-store
---gc</command></link>.</para>
+<para>The command <command>nix-collect-garbage</command> is mostly an
+alias of <link linkend="rsec-nix-store-gc"><command>nix-store
+--gc</command></link>, that is, it deletes all unreachable paths in
+the Nix store to clean up your system.  However, it provides an
+additional option <option>-d</option> (<option>--delete-old</option>)
+that deletes all old generations of all profiles in
+<filename>/nix/var/nix/profiles</filename> by invoking
+<literal>nix-env --delete-generations old</literal> on all profiles.
+Of course, this makes rollbacks to previous configurations
+impossible.</para>
+
+</refsection>
+
+<refsection><title>Example</title>
+
+<para>To delete from the Nix store everything that is not used by the
+current generations of each profile, do
+
+<screen>
+$ nix-collect-garbage -d</screen>
+
+</para>
 
 </refsection>
 

doc/manual/package-management.xml

@@ -44,7 +44,7 @@ xlink:href='http://nix.cs.uu.nl/dist/nix' />.</para>
 Packages, you can view the set of available components in the release:
 
 <screen>
-$ nix-env -qaf nixpkgs-<replaceable>version</replaceable>
+$ nix-env -qaf nixpkgs-<replaceable>version</replaceable> '*'
 ant-blackdown-1.4.2
 aterm-2.2
 bash-3.0
@@ -62,7 +62,7 @@ available components, i.e., whether they are installed into the user
 environment and/or present in the system:
 
 <screen>
-$ nix-env -qasf nixpkgs-<replaceable>version</replaceable>
+$ nix-env -qasf nixpkgs-<replaceable>version</replaceable> '*'
 ...
 -PS bash-3.0
 --S binutils-2.15
@@ -382,6 +382,19 @@ $ nix-store --gc --print-dead</screen>
 Likewise, the option <option>--print-live</option> will show the paths
 that <emphasis>won’t</emphasis> be deleted.</para>
 
+<para>There is also a convenient little utility
+<command>nix-collect-garbage</command>, which when invoked with the
+<option>-d</option> (<option>--delete-old</option>) switch deletes all
+old generations of all profiles in
+<filename>/nix/var/nix/profiles</filename>.  So
+
+<screen>
+$ nix-collect-garbage -d</screen>
+
+is a quick and easy way to clean up your system.</para>
+
+
+
 
 <section xml:id="ssec-gc-roots"><title>Garbage collector roots</title>
 
@@ -463,4 +476,11 @@ available in the subscribed channels.</para>
 </section>
 
 
+<section xml:id="sec-one-click"><title>One-click installations</title>
+
+<para>TODO</para>
+
+</section>
+
+
 </chapter>

doc/manual/quick-start.xml

@@ -96,6 +96,16 @@ The latter command will upgrade each installed component for which
 there is a “newer” version (as determined by comparing the version
 numbers).</para></listitem>
 
+<listitem><para>You can also install specific packages directly from
+your web browser.  For instance, you can go to <link
+xlink:href="http://nix.cs.uu.nl/dist/nix/nixpkgs-unstable-latest/" />
+and click on any link for the individual packages for your platform.
+Associate <literal>application/nix-package</literal> with the program
+<filename>/nix/bin/nix-install-package</filename>.  A window should
+appear asking you whether it’s okay to install the package.  Say
+<literal>Y</literal>.  The package and all its dependencies will be
+installed.</para></listitem>
+
 <listitem><para>If you're unhappy with the result of a
 <command>nix-env</command> action (e.g., an upgraded component turned
 out not to work properly), you can go back: