diff --git a/src/Hydra/lib/Hydra/Controller/Root.pm b/src/Hydra/lib/Hydra/Controller/Root.pm
index cfcca540..2ba4e732 100644
--- a/src/Hydra/lib/Hydra/Controller/Root.pm
+++ b/src/Hydra/lib/Hydra/Controller/Root.pm
@@ -56,8 +56,9 @@ sub index :Path :Args(0) {
     # Get the latest finished build for each unique job.
     $c->stash->{latestBuilds} = [$c->model('DB::Builds')->search(undef,
         { join => 'resultInfo'
-        , where => "finished != 0 and timestamp = (select max(timestamp) from Builds where project == me.project and attrName == me.attrName and finished != 0)"
-        , order_by => "project, attrname"
+        , where => "finished != 0 and timestamp = (select max(timestamp) from Builds " .
+            "where project == me.project and attrName == me.attrName and finished != 0 and system == me.system)"
+        , order_by => "project, attrname, system"
         })];
 }
 
diff --git a/src/Hydra/lib/Hydra/Schema.pm b/src/Hydra/lib/Hydra/Schema.pm
index 3be5f210..e192e083 100644
--- a/src/Hydra/lib/Hydra/Schema.pm
+++ b/src/Hydra/lib/Hydra/Schema.pm
@@ -8,8 +8,8 @@ use base 'DBIx::Class::Schema';
 __PACKAGE__->load_classes;
 
 
-# Created by DBIx::Class::Schema::Loader v0.04005 @ 2008-11-25 11:59:19
-# DO NOT MODIFY THIS OR ANYTHING ABOVE! md5sum:8AQc7Q1I5DrtSjFp722iMA
+# Created by DBIx::Class::Schema::Loader v0.04005 @ 2008-11-25 12:58:40
+# DO NOT MODIFY THIS OR ANYTHING ABOVE! md5sum:iYwU4nHj9C2HkHwpYlVygQ
 
 
 # You can replace this text with custom content, and it will be preserved on regeneration
diff --git a/src/Hydra/lib/Hydra/Schema/Buildinputs.pm b/src/Hydra/lib/Hydra/Schema/Buildinputs.pm
index 15efc07f..0c5eb4e8 100644
--- a/src/Hydra/lib/Hydra/Schema/Buildinputs.pm
+++ b/src/Hydra/lib/Hydra/Schema/Buildinputs.pm
@@ -36,8 +36,8 @@ __PACKAGE__->belongs_to("build", "Hydra::Schema::Builds", { id => "build" });
 __PACKAGE__->belongs_to("dependency", "Hydra::Schema::Builds", { id => "dependency" });
 
 
-# Created by DBIx::Class::Schema::Loader v0.04005 @ 2008-11-25 11:59:19
-# DO NOT MODIFY THIS OR ANYTHING ABOVE! md5sum:NSUTUwG2qbvbFkZxezeSEA
+# Created by DBIx::Class::Schema::Loader v0.04005 @ 2008-11-25 12:58:40
+# DO NOT MODIFY THIS OR ANYTHING ABOVE! md5sum:H8JAWhQt1ehZTEEPH2KGBw
 
 
 # You can replace this text with custom content, and it will be preserved on regeneration
diff --git a/src/Hydra/lib/Hydra/Schema/Buildproducts.pm b/src/Hydra/lib/Hydra/Schema/Buildproducts.pm
index 2b1a933e..9b0fa38a 100644
--- a/src/Hydra/lib/Hydra/Schema/Buildproducts.pm
+++ b/src/Hydra/lib/Hydra/Schema/Buildproducts.pm
@@ -33,8 +33,8 @@ __PACKAGE__->set_primary_key("build", "productnr");
 __PACKAGE__->belongs_to("build", "Hydra::Schema::Builds", { id => "build" });
 
 
-# Created by DBIx::Class::Schema::Loader v0.04005 @ 2008-11-25 11:59:19
-# DO NOT MODIFY THIS OR ANYTHING ABOVE! md5sum:9b3ZNy73Cjat0gr5nQHIpA
+# Created by DBIx::Class::Schema::Loader v0.04005 @ 2008-11-25 12:58:40
+# DO NOT MODIFY THIS OR ANYTHING ABOVE! md5sum:EAo0rZSn+5Q5OY7Y1xjuyA
 
 
 # You can replace this text with custom content, and it will be preserved on regeneration
diff --git a/src/Hydra/lib/Hydra/Schema/Buildresultinfo.pm b/src/Hydra/lib/Hydra/Schema/Buildresultinfo.pm
index 98460dca..6c994ef9 100644
--- a/src/Hydra/lib/Hydra/Schema/Buildresultinfo.pm
+++ b/src/Hydra/lib/Hydra/Schema/Buildresultinfo.pm
@@ -27,8 +27,8 @@ __PACKAGE__->set_primary_key("id");
 __PACKAGE__->belongs_to("id", "Hydra::Schema::Builds", { id => "id" });
 
 
-# Created by DBIx::Class::Schema::Loader v0.04005 @ 2008-11-25 11:59:19
-# DO NOT MODIFY THIS OR ANYTHING ABOVE! md5sum:uTiPHxrs6S19Laa/qeb7CA
+# Created by DBIx::Class::Schema::Loader v0.04005 @ 2008-11-25 12:58:40
+# DO NOT MODIFY THIS OR ANYTHING ABOVE! md5sum:5R03Kdy5ujkr7s9OfCNbTA
 
 
 # You can replace this text with custom content, and it will be preserved on regeneration
diff --git a/src/Hydra/lib/Hydra/Schema/Builds.pm b/src/Hydra/lib/Hydra/Schema/Builds.pm
index 70091220..68eca555 100644
--- a/src/Hydra/lib/Hydra/Schema/Builds.pm
+++ b/src/Hydra/lib/Hydra/Schema/Builds.pm
@@ -70,8 +70,8 @@ __PACKAGE__->has_many(
 );
 
 
-# Created by DBIx::Class::Schema::Loader v0.04005 @ 2008-11-25 11:59:19
-# DO NOT MODIFY THIS OR ANYTHING ABOVE! md5sum:Ky0EF25kaZIaY+ofkP0ohw
+# Created by DBIx::Class::Schema::Loader v0.04005 @ 2008-11-25 12:58:40
+# DO NOT MODIFY THIS OR ANYTHING ABOVE! md5sum:G1KBKGvEgnTcrgDkUnG1UQ
 
 __PACKAGE__->has_many(dependents => 'Hydra::Schema::Buildinputs', 'dependency');
 
diff --git a/src/Hydra/lib/Hydra/Schema/Buildschedulinginfo.pm b/src/Hydra/lib/Hydra/Schema/Buildschedulinginfo.pm
index 658cd3a5..3e3d2ba4 100644
--- a/src/Hydra/lib/Hydra/Schema/Buildschedulinginfo.pm
+++ b/src/Hydra/lib/Hydra/Schema/Buildschedulinginfo.pm
@@ -23,8 +23,8 @@ __PACKAGE__->set_primary_key("id");
 __PACKAGE__->belongs_to("id", "Hydra::Schema::Builds", { id => "id" });
 
 
-# Created by DBIx::Class::Schema::Loader v0.04005 @ 2008-11-25 11:59:19
-# DO NOT MODIFY THIS OR ANYTHING ABOVE! md5sum:kt5gBt14ay7/DiIaQpKopA
+# Created by DBIx::Class::Schema::Loader v0.04005 @ 2008-11-25 12:58:40
+# DO NOT MODIFY THIS OR ANYTHING ABOVE! md5sum:MkMR6pE6mrN2BQL18ROYfA
 
 
 # You can replace this text with custom content, and it will be preserved on regeneration
diff --git a/src/Hydra/lib/Hydra/Schema/Buildsteps.pm b/src/Hydra/lib/Hydra/Schema/Buildsteps.pm
index 420d86f8..73eae700 100644
--- a/src/Hydra/lib/Hydra/Schema/Buildsteps.pm
+++ b/src/Hydra/lib/Hydra/Schema/Buildsteps.pm
@@ -35,8 +35,8 @@ __PACKAGE__->set_primary_key("id", "stepnr");
 __PACKAGE__->belongs_to("id", "Hydra::Schema::Builds", { id => "id" });
 
 
-# Created by DBIx::Class::Schema::Loader v0.04005 @ 2008-11-25 11:59:19
-# DO NOT MODIFY THIS OR ANYTHING ABOVE! md5sum:ljGW5oOaJQ/uUKQx80W5SA
+# Created by DBIx::Class::Schema::Loader v0.04005 @ 2008-11-25 12:58:40
+# DO NOT MODIFY THIS OR ANYTHING ABOVE! md5sum:JbawGso3rboFeQMX6XfgXQ
 
 
 # You can replace this text with custom content, and it will be preserved on regeneration
diff --git a/src/Hydra/lib/Hydra/Schema/Jobsetinputalts.pm b/src/Hydra/lib/Hydra/Schema/Jobsetinputalts.pm
index 59e9e62b..095b39bb 100644
--- a/src/Hydra/lib/Hydra/Schema/Jobsetinputalts.pm
+++ b/src/Hydra/lib/Hydra/Schema/Jobsetinputalts.pm
@@ -31,8 +31,8 @@ __PACKAGE__->belongs_to(
 );
 
 
-# Created by DBIx::Class::Schema::Loader v0.04005 @ 2008-11-25 11:59:19
-# DO NOT MODIFY THIS OR ANYTHING ABOVE! md5sum:mG0ka8XxC3ZEs/KgGKe5Hg
+# Created by DBIx::Class::Schema::Loader v0.04005 @ 2008-11-25 12:58:40
+# DO NOT MODIFY THIS OR ANYTHING ABOVE! md5sum:7+oJOQegjLhp5JeuCS0KPw
 
 
 # You can replace this text with custom content, and it will be preserved on regeneration
diff --git a/src/Hydra/lib/Hydra/Schema/Jobsetinputs.pm b/src/Hydra/lib/Hydra/Schema/Jobsetinputs.pm
index c43d0af4..6bcfc9be 100644
--- a/src/Hydra/lib/Hydra/Schema/Jobsetinputs.pm
+++ b/src/Hydra/lib/Hydra/Schema/Jobsetinputs.pm
@@ -43,8 +43,8 @@ __PACKAGE__->has_many(
 );
 
 
-# Created by DBIx::Class::Schema::Loader v0.04005 @ 2008-11-25 11:59:19
-# DO NOT MODIFY THIS OR ANYTHING ABOVE! md5sum:trcxVA3lLfgTC0TCHL3mVw
+# Created by DBIx::Class::Schema::Loader v0.04005 @ 2008-11-25 12:58:40
+# DO NOT MODIFY THIS OR ANYTHING ABOVE! md5sum:BCzeQkhJYieHoL4ppjdJvw
 
 
 # You can replace this text with custom content, and it will be preserved on regeneration
diff --git a/src/Hydra/lib/Hydra/Schema/Jobsets.pm b/src/Hydra/lib/Hydra/Schema/Jobsets.pm
index b1564fc8..f158e9f2 100644
--- a/src/Hydra/lib/Hydra/Schema/Jobsets.pm
+++ b/src/Hydra/lib/Hydra/Schema/Jobsets.pm
@@ -18,6 +18,10 @@ __PACKAGE__->add_columns(
   { data_type => "text", is_nullable => 0, size => undef },
   "nixexprpath",
   { data_type => "text", is_nullable => 0, size => undef },
+  "errormsg",
+  { data_type => "text", is_nullable => 0, size => undef },
+  "errortime",
+  { data_type => "integer", is_nullable => 0, size => undef },
 );
 __PACKAGE__->set_primary_key("project", "name");
 __PACKAGE__->has_many(
@@ -44,8 +48,8 @@ __PACKAGE__->has_many(
 );
 
 
-# Created by DBIx::Class::Schema::Loader v0.04005 @ 2008-11-25 11:59:19
-# DO NOT MODIFY THIS OR ANYTHING ABOVE! md5sum:MYl8lWfWLCIAGSulR3m5zw
+# Created by DBIx::Class::Schema::Loader v0.04005 @ 2008-11-25 12:58:40
+# DO NOT MODIFY THIS OR ANYTHING ABOVE! md5sum:kEcdBc9XKVhz6zO/XEkAxg
 
 
 # You can replace this text with custom content, and it will be preserved on regeneration
diff --git a/src/Hydra/lib/Hydra/Schema/Projects.pm b/src/Hydra/lib/Hydra/Schema/Projects.pm
index 0ea71191..2e00b952 100644
--- a/src/Hydra/lib/Hydra/Schema/Projects.pm
+++ b/src/Hydra/lib/Hydra/Schema/Projects.pm
@@ -30,8 +30,8 @@ __PACKAGE__->has_many(
 );
 
 
-# Created by DBIx::Class::Schema::Loader v0.04005 @ 2008-11-25 11:59:19
-# DO NOT MODIFY THIS OR ANYTHING ABOVE! md5sum:tLlYQAkX5CeUR2GJir8ifg
+# Created by DBIx::Class::Schema::Loader v0.04005 @ 2008-11-25 12:58:40
+# DO NOT MODIFY THIS OR ANYTHING ABOVE! md5sum:rRYzLbd9BlZAQdOjT/GQcw
 
 
 # You can replace this text with custom content, and it will be preserved on regeneration
diff --git a/src/Hydra/programs/Scheduler.pl b/src/Hydra/programs/Scheduler.pl
index 2d7f6381..8c8746ef 100644
--- a/src/Hydra/programs/Scheduler.pl
+++ b/src/Hydra/programs/Scheduler.pl
@@ -3,6 +3,7 @@
 use strict;
 use XML::Simple;
 use Hydra::Schema;
+use IPC::Run;
 
 
 my $db = Hydra::Schema->connect("dbi:SQLite:dbname=hydra.sqlite", "", "", {});
@@ -16,6 +17,13 @@ sub isValidPath {
 }
 
 
+sub captureStdoutStderr {
+    my $stdin = ""; my $stdout; my $stderr;
+    my $res = IPC::Run::run(\@_, \$stdin, \$stdout, \$stderr);
+    return ($res, $stdout, $stderr);
+}
+
+    
 sub getStorePathHash {
     my ($storePath) = @_;
     my $hash = `nix-store --query --hash $storePath`
@@ -36,10 +44,11 @@ sub fetchInput {
 
     if ($type eq "path") {
         my $uri = $alt->value;
+        print "copying input ", $input->name, " from $uri\n";
+        
         my $storePath = `nix-store --add "$uri"`
             or die "cannot copy path $uri to the Nix store";
         chomp $storePath;
-        print "          copied to $storePath\n";
         
         $$inputInfo{$input->name} =
             { type => $type
@@ -64,13 +73,16 @@ sub checkJob {
     my ($project, $jobset, $inputInfo, $nixExprPath, $jobName, $jobExpr, $extraArgs) = @_;
     
     # Instantiate the store derivation.
-    my $drvPath = `nix-instantiate $nixExprPath --attr $jobName $extraArgs`
-        or die "cannot evaluate the Nix expression containing the job definitions: $?";
+    (my $res, my $drvPath, my $stderr) = captureStdoutStderr(
+        "nix-instantiate", $nixExprPath, "--attr", $jobName, @{$extraArgs});
+    die "cannot evaluate the Nix expression for job `$jobName':\n$stderr" unless $res;
     chomp $drvPath;
 
-    # Call nix-env --xml to get info about this job (drvPath, outPath, meta attributes, ...).
-    my $infoXml = `nix-env -f $nixExprPath --query --available "*" --attr-path --out-path --drv-path --meta --xml --system-filter "*" --attr $jobName $extraArgs`
-        or die "cannot get information about the job: $?";
+    # Call nix-env --xml to get info about this job (drvPath, outPath, meta attributes, ...). 
+    ($res, my $infoXml, $stderr) = captureStdoutStderr(
+        qw(nix-env --query --available * --attr-path --out-path --drv-path --meta --xml --system-filter *),
+        "-f", $nixExprPath, "--attr", $jobName, @{$extraArgs});
+    die "cannot get information about the job `$jobName':\n$stderr" unless $res;
 
     my $info = XMLin($infoXml, ForceArray => 1, KeyAttr => ['attrPath', 'name'])
         or die "cannot parse XML output";
@@ -87,11 +99,11 @@ sub checkJob {
                 { project => $project->name, jobset => $jobset->name
                 , attrname => $jobName, outPath => $outPath })) > 0)
         {
-            print "      already scheduled/done\n";
+            print "already scheduled/done\n";
             return;
         }
 
-        print "      adding to queue\n";
+        print "adding to queue\n";
         
         my $build = $db->resultset('Builds')->create(
             { finished => 0
@@ -132,6 +144,18 @@ sub checkJob {
 };
 
 
+sub setJobsetError {
+    my ($jobset, $errorMsg) = @_;
+    eval {
+        $db->txn_do(sub {
+            $jobset->errormsg($errorMsg);
+            $jobset->errortime(time);
+            $jobset->update;
+        });
+    };
+}
+
+
 sub checkJobAlternatives {
     my ($project, $jobset, $inputInfo, $nixExprPath, $jobName, $jobExpr, $extraArgs, $argsNeeded, $n) = @_;
 
@@ -139,12 +163,15 @@ sub checkJobAlternatives {
         eval {
             checkJob($project, $jobset, $inputInfo, $nixExprPath, $jobName, $jobExpr, $extraArgs);
         };
-        warn $@ if $@;
+        if ($@) {
+            print "error evaluating job `", $jobName, "': $@";
+            setJobsetError($jobset, $@);
+        }
         return;
     }
 
     my $argName = @{$argsNeeded}[$n];
-    print "      finding alternatives for argument $argName\n";
+    #print "finding alternatives for argument $argName\n";
 
     my ($input) = $jobset->jobsetinputs->search({name => $argName});
 
@@ -153,18 +180,17 @@ sub checkJobAlternatives {
     if (defined $input) {
         
         foreach my $alt ($input->jobsetinputalts) {
-            print "        INPUT ", $input->name, " (type ", $input->type, ") alt ", $alt->altnr, "\n";
+            #print "input ", $input->name, " (type ", $input->type, ") alt ", $alt->altnr, "\n";
             fetchInput($input, $alt, $inputInfo); # !!! caching
-            my $newArgs = "";
+            my @newArgs = @{$extraArgs};
             if (defined $inputInfo->{$argName}->{storePath}) {
-                # !!! escaping
-                $newArgs = " --arg $argName '{path = " . $inputInfo->{$argName}->{storePath} . ";}'";
+                push @newArgs, "--arg", $argName, "{path = " . $inputInfo->{$argName}->{storePath} . ";}";
             } elsif (defined $inputInfo->{$argName}->{value}) {
-                $newArgs = " --argstr $argName '" . $inputInfo->{$argName}->{value} . "'";
+                push @newArgs, "--argstr", $argName, $inputInfo->{$argName}->{value};
             }
             checkJobAlternatives(
                 $project, $jobset, $inputInfo, $nixExprPath,
-                $jobName, $jobExpr, $extraArgs . $newArgs, $argsNeeded, $n + 1);
+                $jobName, $jobExpr, \@newArgs, $argsNeeded, $n + 1);
         }
     }
 
@@ -192,15 +218,16 @@ sub checkJobAlternatives {
             , id => $prevBuild->id
             };
 
+        my @newArgs = @{$extraArgs};
+        push @newArgs, "--arg", $argName, "{path = " . $prevBuild->outpath . ";}";
+        
         checkJobAlternatives(
             $project, $jobset, $inputInfo, $nixExprPath,
-            $jobName, $jobExpr,
-            $extraArgs . " --arg $argName '{path = " . $prevBuild->outpath . ";}'",
-            $argsNeeded, $n + 1);
+            $jobName, $jobExpr, \@newArgs, $argsNeeded, $n + 1);
     }
 }
 
-    
+
 sub checkJobSet {
     my ($project, $jobset) = @_;
     my $inputInfo = {};
@@ -216,10 +243,11 @@ sub checkJobSet {
     # Evaluate the Nix expression.
     my $nixExprPath = $inputInfo->{$jobset->nixexprinput}->{storePath} . "/" . $jobset->nixexprpath;
 
-    print "    EVALUATING $nixExprPath\n";
- 
-    my $jobsXml = `nix-instantiate $nixExprPath --eval-only --strict --xml`
-        or die "cannot evaluate the Nix expression containing the jobs: $?";
+    print "evaluating $nixExprPath\n";
+
+    (my $res, my $jobsXml, my $stderr) = captureStdoutStderr(
+        "nix-instantiate", $nixExprPath, "--eval-only", "--strict", "--xml");
+    die "cannot evaluate the Nix expression containing the jobs:\n$stderr" unless $res;
 
     my $jobs = XMLin($jobsXml,
                      ForceArray => ['value', 'attr'],
@@ -235,7 +263,7 @@ sub checkJobSet {
     # function, then fill in the function arguments with the
     # (alternative) values supplied in the jobsetinputs table.
     foreach my $jobName (keys(%{$jobs->{attrs}->{attr}})) {
-        print "    JOB $jobName\n";
+        print "considering job $jobName\n";
 
         my @argsNeeded = ();
         
@@ -244,7 +272,7 @@ sub checkJobSet {
         # !!! fix the case where there is only 1 attr, XML::Simple fucks up as usual
         if (defined $jobExpr->{function}->{attrspat}) {
             foreach my $argName (keys(%{$jobExpr->{function}->{attrspat}->{attr}})) {
-                print "      needs input $argName\n";
+                #print "needs input $argName\n";
                 push @argsNeeded, $argName;
             }            
         }
@@ -252,7 +280,7 @@ sub checkJobSet {
         eval {
             checkJobAlternatives(
                 $project, $jobset, {}, $nixExprPath,
-                $jobName, $jobExpr, "", \@argsNeeded, 0);
+                $jobName, $jobExpr, [], \@argsNeeded, 0);
         };
         warn $@ if $@;
     }
@@ -262,14 +290,17 @@ sub checkJobSet {
 sub checkJobs {
 
     foreach my $project ($db->resultset('Projects')->search({enabled => 1})) {
-        print "PROJECT ", $project->name, "\n";
+        print "considering project ", $project->name, "\n";
         foreach my $jobset ($project->jobsets->all) {
-            print "  JOBSET ", $jobset->name, "\n";
+            print "considering jobset ", $jobset->name, " in ", $project->name, "\n";
             eval {
                 checkJobSet($project, $jobset);
-            }; 
-            warn $@ if $@;
-       }
+            };
+            if ($@) {
+                print "error evaluating jobset ", $jobset->name, ": $@";
+                setProjectError($jobset, $@);
+            }
+        }
     }
     
 }
diff --git a/src/Hydra/root/build.tt b/src/Hydra/root/build.tt
index 4576f02b..9c054dba 100644
--- a/src/Hydra/root/build.tt
+++ b/src/Hydra/root/build.tt
@@ -1,7 +1,6 @@
 [% WRAPPER layout.tt title="Hydra Overview" %]
 [% PROCESS common.tt %]
 [% USE HTML %]
-[% USE date %]
 [% USE mibs=format("%.2f") %]
 
 <h1>
@@ -25,7 +24,7 @@
   </tr>
   <tr>
     <th>Time added:</th>
-    <td>[% date.format(build.timestamp, '%Y-%m-%d %H:%M:%S') %]</td>
+    <td>[% PROCESS renderDateTime timestamp = build.timestamp %]</td>
   </tr>
   <tr>
     <th>Status:</th>
@@ -87,11 +86,11 @@
   [% IF build.finished %]
   <tr>
     <th>Build started:</th>
-    <td>[% IF build.resultInfo.starttime %][% date.format(build.resultInfo.starttime, '%Y-%m-%d %H:%M:%S') %][% ELSE %]<em>(cached build)</em>[% END %]</td>
+    <td>[% IF build.resultInfo.starttime %][% PROCESS renderDateTime timestamp = build.resultInfo.starttime %][% ELSE %]<em>(cached build)</em>[% END %]</td>
   </tr>
   <tr>
     <th>Build finished:</th>
-    <td>[% IF build.resultInfo.stoptime %][% date.format(build.resultInfo.stoptime, '%Y-%m-%d %H:%M:%S') %][% ELSE %]<em>(cached build)</em>[% END %]</td>
+    <td>[% IF build.resultInfo.stoptime %][% PROCESS renderDateTime timestamp = build.resultInfo.stoptime %][% ELSE %]<em>(cached build)</em>[% END %]</td>
   </tr>
   <tr>
     <th>Duration (seconds):</th>
@@ -348,7 +347,7 @@
         <td><a href="[% c.uri_for('/build' input.build.id) %]">Job <tt>[% input.build.project.name %]:[% input.build.attrname %]</tt> build [% input.build.id %]</a></td>
         <td><tt>[% input.name %]</tt></td>
         <td><tt>[% input.build.system %]</tt></td>
-        <td>[% date.format(input.build.timestamp, '%Y-%m-%d %H:%M:%S') %]</td>
+        <td>[% PROCESS renderDateTime timestamp = input.build.timestamp %]</td>
       </tr>
     [% END -%]
   </tbody>
diff --git a/src/Hydra/root/common.tt b/src/Hydra/root/common.tt
index 49601ff7..a47753a5 100644
--- a/src/Hydra/root/common.tt
+++ b/src/Hydra/root/common.tt
@@ -7,3 +7,9 @@
     , "build" = "Build output"
     }
 %]
+
+[% USE date %]
+
+[% BLOCK renderDateTime %]
+  [% date.format(timestamp, '%Y-%m-%d %H:%M:%S') -%]
+[% END %]
\ No newline at end of file
diff --git a/src/Hydra/root/index.tt b/src/Hydra/root/index.tt
index ede9b85e..29e00d67 100644
--- a/src/Hydra/root/index.tt
+++ b/src/Hydra/root/index.tt
@@ -67,13 +67,4 @@
 </table>
 
 
-<h2>Projects</h2>
-
-<ul>
-  [% FOREACH project IN projects -%]
-    <li><a href="[% c.uri_for('/project' project.name) %]"><tt>[% project.name %]</tt></a></li>
-  [% END -%]
-</ul>
-
-
 [% END %]
diff --git a/src/Hydra/root/layout.tt b/src/Hydra/root/layout.tt
index 3a7c018c..477ea5f7 100644
--- a/src/Hydra/root/layout.tt
+++ b/src/Hydra/root/layout.tt
@@ -119,4 +119,4 @@
     </div>
   </body>
 
-</html>
\ No newline at end of file
+</html>
diff --git a/src/Hydra/root/project.tt b/src/Hydra/root/project.tt
index d1069260..03cd6f8f 100644
--- a/src/Hydra/root/project.tt
+++ b/src/Hydra/root/project.tt
@@ -88,6 +88,15 @@
         <tt>[% INCLUDE maybeEditString param="jobset-$baseName-nixexprinput" value=jobset.nixexprinput extraClass="shortString" %]</tt>
       </td>
     </tr>
+    [% IF !edit && jobset.errormsg %]
+      <tr>
+        <th>Last evaluation error:</th>
+        <td>
+          <em>On [% PROCESS renderDateTime timestamp = jobset.errortime %]:</em>
+          <pre class="multiLineMsg error">[% HTML.escape(jobset.errormsg) %]</pre>
+        </td>
+      </tr>
+    [% END %]
   </table>
 
   <h4>Inputs</h4>
diff --git a/src/Hydra/root/static/css/hydra.css b/src/Hydra/root/static/css/hydra.css
index 91e828d2..25343dff 100644
--- a/src/Hydra/root/static/css/hydra.css
+++ b/src/Hydra/root/static/css/hydra.css
@@ -44,6 +44,7 @@ td {
 }
 
 th {
+    vertical-align: top;
     background: #ffffc0;
 }
 
@@ -169,6 +170,12 @@ div.buildlog {
     padding: 0.3em;
 }
 
+.multiLineMsg {
+    padding: 0em;
+    margin: 0em;
+    white-space: pre-wrap;
+}
+
 ul.productList {
     list-style: none;
     padding-left: 1em;
diff --git a/src/Hydra/root/static/css/logfile.css b/src/Hydra/root/static/css/logfile.css
index b5dfdc72..bf8c50f5 100644
--- a/src/Hydra/root/static/css/logfile.css
+++ b/src/Hydra/root/static/css/logfile.css
@@ -86,4 +86,4 @@ em.storeref:hover span.popup {
 
 code {
     white-space: pre-wrap;
-}
\ No newline at end of file
+}
diff --git a/src/hydra.sql b/src/hydra.sql
index 99c7eaad..61174fb3 100644
--- a/src/hydra.sql
+++ b/src/hydra.sql
@@ -170,6 +170,8 @@ create table Jobsets (
     description   text,
     nixExprInput  text not null, -- name of the jobsetInput containing the Nix expression
     nixExprPath   text not null, -- relative path of the Nix expression
+    errorMsg      text, -- used to signal the last evaluation error etc. for this jobset
+    errorTime     integer, -- timestamp associated with errorMsg
     primary key   (project, name),
     foreign key   (project) references Projects(name) on delete cascade, -- ignored by sqlite
     foreign key   (project, name, nixExprInput) references JobsetInputs(project, job, name)