diff --git a/src/hydra-eval-jobs/hydra-eval-jobs.cc b/src/hydra-eval-jobs/hydra-eval-jobs.cc
index 8f57fd8c..1fe94874 100644
--- a/src/hydra-eval-jobs/hydra-eval-jobs.cc
+++ b/src/hydra-eval-jobs/hydra-eval-jobs.cc
@@ -129,6 +129,7 @@ static void findJobsWrapped(EvalState & state, JSONObject & top,
             res.attr("schedulingPriority", drv.queryMetaInt("schedulingPriority", 100));
             res.attr("timeout", drv.queryMetaInt("timeout", 36000));
             res.attr("maxSilent", drv.queryMetaInt("maxSilent", 7200));
+            res.attr("isChannel", drv.queryMetaBool("isHydraChannel", false));
 
             /* If this is an aggregate, then get its constituents. */
             Bindings::iterator a = v.attrs->find(state.symbols.create("_hydraAggregate"));
diff --git a/src/lib/Hydra/Base/Controller/ListBuilds.pm b/src/lib/Hydra/Base/Controller/ListBuilds.pm
index b971d5e8..2568b117 100644
--- a/src/lib/Hydra/Base/Controller/ListBuilds.pm
+++ b/src/lib/Hydra/Base/Controller/ListBuilds.pm
@@ -32,23 +32,16 @@ sub all : Chained('get_builds') PathPart {
 }
 
 
-sub nix : Chained('get_builds') PathPart('channel') CaptureArgs(1) {
+sub nix : Chained('get_builds') PathPart('channel/latest') CaptureArgs(1) {
     my ($self, $c, $channelName) = @_;
-    eval {
-        if ($channelName eq "latest") {
-            $c->stash->{channelName} = $c->stash->{channelBaseName} . "-latest";
-            $c->stash->{channelBuilds} = $c->stash->{latestSucceeded}
-                ->search_literal("exists (select 1 from buildproducts where build = me.id and type = 'nix-build')")
-                ->search({}, { columns => [@buildListColumns, 'drvpath', 'description', 'homepage']
-                             , join => ["buildoutputs"]
-                             , order_by => ["me.id", "buildoutputs.name"]
-                             , '+select' => ['buildoutputs.path', 'buildoutputs.name'], '+as' => ['outpath', 'outname'] });
-        }
-        else {
-            notFound($c, "Unknown channel `$channelName'.");
-        }
-    };
-    error($c, $@) if $@;
+
+    $c->stash->{channelName} = $c->stash->{channelBaseName} . "-latest";
+    $c->stash->{channelBuilds} = $c->stash->{latestSucceeded}
+        ->search_literal("exists (select 1 from buildproducts where build = me.id and type = 'nix-build')")
+        ->search({}, { columns => [@buildListColumns, 'drvpath', 'description', 'homepage']
+                     , join => ["buildoutputs"]
+                     , order_by => ["me.id", "buildoutputs.name"]
+                     , '+select' => ['buildoutputs.path', 'buildoutputs.name'], '+as' => ['outpath', 'outname'] });
 }
 
 
diff --git a/src/lib/Hydra/Base/Controller/NixChannel.pm b/src/lib/Hydra/Base/Controller/NixChannel.pm
index 19e5bf8e..3d68220c 100644
--- a/src/lib/Hydra/Base/Controller/NixChannel.pm
+++ b/src/lib/Hydra/Base/Controller/NixChannel.pm
@@ -130,6 +130,7 @@ sub channel_contents : Chained('nix') PathPart('') Args(0) {
     # garbage-collected.  That should be true for the "latest"
     # channel.
     getChannelData($c, 0);
+    $c->stash->{genericChannel} = 1;
     $c->stash->{template} = 'channel-contents.tt';
     $c->stash->{nixPkgs} = [sortPkgs @{$c->stash->{nixPkgs}}];
 }
diff --git a/src/lib/Hydra/Controller/Channel.pm b/src/lib/Hydra/Controller/Channel.pm
new file mode 100644
index 00000000..902d6019
--- /dev/null
+++ b/src/lib/Hydra/Controller/Channel.pm
@@ -0,0 +1,83 @@
+package Hydra::Controller::Channel;
+
+use strict;
+use warnings;
+use base 'Hydra::Base::Controller::REST';
+
+
+sub channel : Chained('/') PathPart('channel/custom') CaptureArgs(3) {
+    my ($self, $c, $projectName, $jobsetName, $channelName) = @_;
+
+    $c->stash->{project} = $c->model('DB::Projects')->find($projectName);
+
+    notFound($c, "Project $projectName doesn't exist.")
+        if !$c->stash->{project};
+
+    $c->stash->{jobset} = $c->stash->{project}->jobsets->find({
+        name => $jobsetName
+    });
+
+    notFound($c, "Jobset $jobsetName doesn't exist.")
+        if !$c->stash->{jobset};
+
+    my $lastSuccessful = $c->model('DB::Builds')->find(
+        { 'eval.hasnewbuilds' => 1
+        , project => $projectName
+        , jobset => $jobsetName
+        , job => $channelName
+        , buildstatus => 0
+        },
+        { rows => 1, order_by => "eval.id desc"
+        , join => { jobsetevalmembers => 'eval' }
+        }
+    );
+
+    notFound($c, "Channel $channelName either doesn't exist ".
+                 "or was never built successfully.")
+        if !$lastSuccessful;
+
+    $c->stash->{lastSuccessful} = $lastSuccessful;
+}
+
+
+sub overview : Chained('channel') PathPart('') Args(0) {
+    my ($self, $c) = @_;
+
+    $c->stash->{constituents} = [
+        $c->stash->{lastSuccessful}->constituents_->search(
+            {}, {order_by => ["job"]}
+        )
+    ];
+
+    $c->stash->{genericChannel} = 0;
+    $c->stash->{template} = 'channel-contents.tt';
+}
+
+
+sub nixexprs : Chained('channel') PathPart('') Args(1) {
+    my ($self, $c, $productName) = @_;
+
+    my $product = $c->stash->{lastSuccessful}->buildproducts->find(
+        { type => "channel", name => $productName }
+    );
+
+    my $url = $c->uri_for(
+        $c->controller("Build")->action_for("download"),
+        [$c->stash->{lastSuccessful}->id],
+        $product->productnr,
+        $productName
+    );
+
+    $c->res->redirect($url);
+}
+
+
+sub binary_cache_url : Chained('channel') PathPart('binary-cache-url') Args(0) {
+    my ($self, $c) = @_;
+    $c->stash->{'plain'} = { data => $c->uri_for('/') };
+    $c->response->content_type('text/plain');
+    $c->forward('Hydra::View::Plain');
+}
+
+
+1;
diff --git a/src/lib/Hydra/Controller/Jobset.pm b/src/lib/Hydra/Controller/Jobset.pm
index 1d1cce63..f2b801f1 100644
--- a/src/lib/Hydra/Controller/Jobset.pm
+++ b/src/lib/Hydra/Controller/Jobset.pm
@@ -108,43 +108,43 @@ sub jobs_tab : Chained('jobsetChain') PathPart('jobs-tab') Args(0) {
     $c->stash->{filter} = $c->request->params->{filter} // "";
     my $filter = "%" . $c->stash->{filter} . "%";
 
-    my @evals = $c->stash->{jobset}->jobsetevals->search({ hasnewbuilds => 1}, { order_by => "id desc", rows => 20 });
-
-    my $evals = {};
-    my %jobs;
-    my $nrBuilds = 0;
-
-    foreach my $eval (@evals) {
-        my @builds = $eval->builds->search(
-            { job => { ilike => $filter } },
-            { columns => ['id', 'job', 'finished', 'buildstatus'] });
-        foreach my $b (@builds) {
-            my $jobName = $b->get_column('job');
-            $evals->{$eval->id}->{timestamp} = $eval->timestamp;
-            $evals->{$eval->id}->{jobs}->{$jobName} =
-                { id => $b->id, finished => $b->finished, buildstatus => $b->buildstatus };
-            $jobs{$jobName} = 1;
-            $nrBuilds++;
-        }
-        last if $nrBuilds >= 10000;
-    }
+    my ($evals, $builds) = searchBuildsAndEvalsForJobset(
+        $c->stash->{jobset},
+        { job => { ilike => $filter }, ischannel => 0 },
+        10000
+    );
 
     if ($c->request->params->{showInactive}) {
         $c->stash->{showInactive} = 1;
         foreach my $job ($c->stash->{jobset}->jobs->search({ name => { ilike => $filter } })) {
-            next if defined $jobs{$job->name};
-            $c->stash->{inactiveJobs}->{$job->name} = $jobs{$job->name} = 1;
+            next if defined $builds->{$job->name};
+            $c->stash->{inactiveJobs}->{$job->name} = $builds->{$job->name} = 1;
         }
     }
 
     $c->stash->{evals} = $evals;
-    my @jobs = sort (keys %jobs);
+    my @jobs = sort (keys %$builds);
     $c->stash->{nrJobs} = scalar @jobs;
     splice @jobs, 250 if $c->stash->{filter} eq "";
     $c->stash->{jobs} = [@jobs];
 }
 
 
+sub channels_tab : Chained('jobsetChain') PathPart('channels-tab') Args(0) {
+    my ($self, $c) = @_;
+    $c->stash->{template} = 'jobset-channels-tab.tt';
+
+    my ($evals, $builds) = searchBuildsAndEvalsForJobset(
+        $c->stash->{jobset},
+        { ischannel => 1 }
+    );
+
+    $c->stash->{evals} = $evals;
+    my @channels = sort (keys %$builds);
+    $c->stash->{channels} = [@channels];
+}
+
+
 # Hydra::Base::Controller::ListBuilds needs this.
 sub get_builds : Chained('jobsetChain') PathPart('') CaptureArgs(0) {
     my ($self, $c) = @_;
diff --git a/src/lib/Hydra/Helper/AddBuilds.pm b/src/lib/Hydra/Helper/AddBuilds.pm
index ae93e243..4d87e34c 100644
--- a/src/lib/Hydra/Helper/AddBuilds.pm
+++ b/src/lib/Hydra/Helper/AddBuilds.pm
@@ -453,6 +453,7 @@ sub checkBuild {
             , busy => 0
             , locker => ""
             , iscurrent => 1
+            , ischannel => $buildInfo->{isChannel}
             });
 
         $build->buildoutputs->create({ name => $_, path => $buildInfo->{outputs}->{$_} })
diff --git a/src/lib/Hydra/Helper/CatalystUtils.pm b/src/lib/Hydra/Helper/CatalystUtils.pm
index d31b3f53..db4640e9 100644
--- a/src/lib/Hydra/Helper/CatalystUtils.pm
+++ b/src/lib/Hydra/Helper/CatalystUtils.pm
@@ -10,6 +10,7 @@ use Hydra::Helper::Nix;
 our @ISA = qw(Exporter);
 our @EXPORT = qw(
     getBuild getPreviousBuild getNextBuild getPreviousSuccessfulBuild
+    searchBuildsAndEvalsForJobset
     error notFound gone accessDenied
     forceLogin requireUser requireProjectOwner requireAdmin requirePost isAdmin isProjectOwner
     trim
@@ -85,6 +86,44 @@ sub getPreviousSuccessfulBuild {
 }
 
 
+sub searchBuildsAndEvalsForJobset {
+    my ($jobset, $condition, $maxBuilds) = @_;
+
+    my @evals = $jobset->jobsetevals->search(
+        { hasnewbuilds => 1},
+        { order_by => "id desc",
+        rows => 20
+    });
+
+    my $evals = {};
+    my %builds;
+    my $nrBuilds = 0;
+
+    foreach my $eval (@evals) {
+        my @allBuilds = $eval->builds->search(
+            $condition,
+            { columns => ['id', 'job', 'finished', 'buildstatus'] }
+        );
+
+        foreach my $b (@allBuilds) {
+            my $jobName = $b->get_column('job');
+
+            $evals->{$eval->id}->{timestamp} = $eval->timestamp;
+            $evals->{$eval->id}->{builds}->{$jobName} = {
+                id => $b->id,
+                finished => $b->finished,
+                buildstatus => $b->buildstatus
+            };
+            $builds{$jobName} = 1;
+            $nrBuilds++;
+        }
+        last if $maxBuilds && $nrBuilds >= $maxBuilds;
+    }
+
+    return ($evals, \%builds);
+}
+
+
 sub error {
     my ($c, $msg, $status) = @_;
     $c->response->status($status) if defined $status;
diff --git a/src/lib/Hydra/Schema/Builds.pm b/src/lib/Hydra/Schema/Builds.pm
index b9dc0437..a22cd670 100644
--- a/src/lib/Hydra/Schema/Builds.pm
+++ b/src/lib/Hydra/Schema/Builds.pm
@@ -116,6 +116,12 @@ __PACKAGE__->table("Builds");
   default_value: 36000
   is_nullable: 1
 
+=head2 ischannel
+
+  data_type: 'integer'
+  default_value: 0
+  is_nullable: 1
+
 =head2 iscurrent
 
   data_type: 'integer'
@@ -239,6 +245,8 @@ __PACKAGE__->add_columns(
   { data_type => "integer", default_value => 3600, is_nullable => 1 },
   "timeout",
   { data_type => "integer", default_value => 36000, is_nullable => 1 },
+  "ischannel",
+  { data_type => "integer", default_value => 0, is_nullable => 1 },
   "iscurrent",
   { data_type => "integer", default_value => 0, is_nullable => 1 },
   "nixexprinput",
@@ -558,8 +566,8 @@ __PACKAGE__->many_to_many(
 );
 
 
-# Created by DBIx::Class::Schema::Loader v0.07043 @ 2015-08-10 15:10:41
-# DO NOT MODIFY THIS OR ANYTHING ABOVE! md5sum:rjifgnPtjY96MaQ7eiGzaA
+# Created by DBIx::Class::Schema::Loader v0.07043 @ 2015-09-10 17:34:23
+# DO NOT MODIFY THIS OR ANYTHING ABOVE! md5sum:JRelp13Cyfi+QVxC92xuqQ
 
 __PACKAGE__->has_many(
   "dependents",
diff --git a/src/root/build.tt b/src/root/build.tt
index d56988e2..369e5648 100644
--- a/src/root/build.tt
+++ b/src/root/build.tt
@@ -190,7 +190,7 @@
                 <td>[% IF cachedBuild; INCLUDE renderFullBuildLink build=cachedBuild; ELSE %]<em>unknown</em>[% END %]</td>
               </tr>
             [% END %]
-            [% IF !isAggregate && build.finished; actualBuild = build.iscachedbuild ? cachedBuild : build %]
+            [% IF (!isAggregate || !build.ischannel) && build.finished; actualBuild = build.iscachedbuild ? cachedBuild : build %]
               [% IF actualBuild %]
                 <tr>
                   <th>Duration:</th>
@@ -202,7 +202,7 @@
                 <td>[% INCLUDE renderDateTime timestamp = build.stoptime; %]</td>
               </tr>
             [% END %]
-            [% IF !isAggregate && buildLogExists(build) %]
+            [% IF (!isAggregate || !build.ischannel) && buildLogExists(build) %]
               <tr>
                 <th>Logfile:</th>
                 <td>
@@ -217,7 +217,7 @@
       </tr>
     </table>
 
-    [% IF build.buildproducts && !isAggregate %]
+    [% IF build.ischannel || (build.buildproducts && !isAggregate) %]
 
       <h3>Build products</h3>
 
diff --git a/src/root/channel-contents.tt b/src/root/channel-contents.tt
index b5f3d269..4335b328 100644
--- a/src/root/channel-contents.tt
+++ b/src/root/channel-contents.tt
@@ -22,12 +22,13 @@ $ nix-env -i foo</pre>
 $ nix-channel --update
 $ nix-env -u '*'</pre>
 
+[% IF genericChannel %]
+
 <p>Alternatively, if you have associated the
 <tt>application/nix-package</tt> MIME type with the
 <tt>nix-install-package</tt> program in your web browser, you can
 install the package simply by clicking on the packages below.</p>
 
-
 <h2>Packages</h2>
 
 <p>This channel contains the following packages.</p>
@@ -69,5 +70,17 @@ install the package simply by clicking on the packages below.</p>
 
 </table>
 
+[% ELSE %]
+[% PROCESS "product-list.tt" %]
+
+<h2>Contents</h2>
+
+[% INCLUDE renderProductList build=lastSuccessful %]
+
+<p>Upgrades depend on the success/failure of the following constituents:</p>
+
+[% INCLUDE renderBuildList builds=constituents %]
+
+[% END %]
 
 [% END %]
diff --git a/src/root/jobset-channels-tab.tt b/src/root/jobset-channels-tab.tt
new file mode 100644
index 00000000..c003d70e
--- /dev/null
+++ b/src/root/jobset-channels-tab.tt
@@ -0,0 +1,34 @@
+[% PROCESS common.tt %]
+
+[% IF channels.size == 0 %]
+
+  <div class="alert">There are no channels available.</div>
+
+[% ELSE %]
+
+  [% evalIds = evals.keys.nsort.reverse %]
+  <table class="table table-striped table-condensed table-header-rotated">
+    <thead>
+      <tr>
+        <th style="width: 1em;">Channel</th>
+        [% FOREACH eval IN evalIds %]
+          <th class="rotate-45">
+            <div><span>
+              <a href="[% c.uri_for('/eval' eval) %]">[% INCLUDE renderRelativeDate timestamp=evals.$eval.timestamp %]</a>
+            </span></div></th>
+        [% END %]
+      </tr>
+    </thead>
+    <tbody>
+      [% FOREACH chan IN channels-%]
+        <tr>
+          <th><span><a href="[% c.uri_for('/channel/custom' project.name jobset.name chan) %]">[% chan %]</a></span></th>
+          [% FOREACH eval IN evalIds %]
+            <td>[% r = evals.$eval.builds.$chan; IF r.id %]<a href="[% c.uri_for('/build' r.id) %]">[% INCLUDE renderBuildStatusIcon size=16 build=r %]</a>[% END %]</td>
+          [% END %]
+        </tr>
+      [% END %]
+    </tbody>
+  </table>
+
+[% END %]
diff --git a/src/root/jobset-jobs-tab.tt b/src/root/jobset-jobs-tab.tt
index 3c5b0832..1a9dac17 100644
--- a/src/root/jobset-jobs-tab.tt
+++ b/src/root/jobset-jobs-tab.tt
@@ -59,7 +59,7 @@
         <tr>
           <th><span [% IF inactiveJobs.$j %]class="muted override-link"[% END %]>[% INCLUDE renderJobName project=project.name jobset=jobset.name job=j %]</span></th>
           [% FOREACH eval IN evalIds %]
-            <td>[% r = evals.$eval.jobs.$j; IF r.id %]<a href="[% c.uri_for('/build' r.id) %]">[% INCLUDE renderBuildStatusIcon size=16 build=r %]</a>[% END %]</td>
+            <td>[% r = evals.$eval.builds.$j; IF r.id %]<a href="[% c.uri_for('/build' r.id) %]">[% INCLUDE renderBuildStatusIcon size=16 build=r %]</a>[% END %]</td>
           [% END %]
         </tr>
       [% END %]
diff --git a/src/root/jobset.tt b/src/root/jobset.tt
index 63ef29b9..04b0efaf 100644
--- a/src/root/jobset.tt
+++ b/src/root/jobset.tt
@@ -64,6 +64,7 @@
   <li><a href="#tabs-jobs" data-toggle="tab">Jobs</a></li>
   <li><a href="#tabs-configuration" data-toggle="tab">Configuration</a></li>
   <li><a href="#tabs-links" data-toggle="tab">Links</a></li>
+  <li><a href="#tabs-channels" data-toggle="tab">Channels</a></li>
 </ul>
 
 <div id="generic-tabs" class="tab-content">
@@ -165,6 +166,8 @@
     </ul>
   </div>
 
+  [% INCLUDE makeLazyTab tabName="tabs-channels" uri=c.uri_for('/jobset' project.name jobset.name "channels-tab") %]
+
 </div>
 
 <script>
diff --git a/src/root/product-list.tt b/src/root/product-list.tt
index 7870834f..17e2911e 100644
--- a/src/root/product-list.tt
+++ b/src/root/product-list.tt
@@ -115,10 +115,9 @@
 
             </td>
           </tr>
+        [% END %]
 
-      [% END %]
-
-      [% CASE "file" %]
+      [% CASE ["file", "channel"] %]
 
       <tr class="product">
         <td>
@@ -137,7 +136,13 @@
           [% CASE "binary-dist" %]
             <img src="[% c.uri_for("/static/images/binary-dist.png") %]" alt="Binary distribution" /> Binary distribution <tt>[% product.name %]</tt>
           [% CASE DEFAULT %]
-            File <tt>[% product.name %]</tt> of type <tt>[% product.subtype %]</tt>
+            [% IF product.type == "channel" %]
+              <img src="[% c.uri_for("/static/images/channel.png") %]" alt="Channel" />
+              Channel expression tarball <tt>[% product.name %]</tt>
+              [% IF product.subtype != "-" %]for <tt>[% product.subtype %]</tt>[% END %]
+            [% ELSE %]
+              File <tt>[% product.name %]</tt> of type <tt>[% product.subtype %]</tt>
+            [% END %]
           [% END %]
         </a>
         [% WRAPPER makePopover title="Details" classes="btn-mini" %]
diff --git a/src/root/static/images/channel.png b/src/root/static/images/channel.png
new file mode 100644
index 00000000..73c296ec
Binary files /dev/null and b/src/root/static/images/channel.png differ
diff --git a/src/sql/hydra.sql b/src/sql/hydra.sql
index f43de8e7..65554627 100644
--- a/src/sql/hydra.sql
+++ b/src/sql/hydra.sql
@@ -157,6 +157,7 @@ create table Builds (
     maxsilent     integer default 3600, -- meta.maxsilent
     timeout       integer default 36000, -- meta.timeout
 
+    isChannel     integer not null default 0, -- meta.isHydraChannel
     isCurrent     integer default 0,
 
     -- Copy of the nixExprInput/nixExprPath fields of the jobset that
diff --git a/src/sql/upgrade-42.sql b/src/sql/upgrade-42.sql
new file mode 100644
index 00000000..558a1bea
--- /dev/null
+++ b/src/sql/upgrade-42.sql
@@ -0,0 +1 @@
+alter table Builds add column isChannel integer not null default 0;