diff --git a/Handler/ShowChallenge.hs b/Handler/ShowChallenge.hs
index 9ebb06e..ed43815 100644
--- a/Handler/ShowChallenge.hs
+++ b/Handler/ShowChallenge.hs
@@ -34,6 +34,8 @@ import Data.Attoparsec.Text
 
 import Data.Text (pack, unpack)
 
+import Data.Conduit.SmartSource
+
 getShowChallengeR :: Text -> Handler Html
 getShowChallengeR name = do
   (Entity challengeId challenge) <- runDB $ getBy404 $ UniqueName name
@@ -300,6 +302,7 @@ outForTest repoDir submissionId (Entity testId test) = do
   checksum <- liftIO $ gatherSHA1ForCollectionOfFiles [outF]
   return Out {
     outSubmission=submissionId,
+    outVariant=Nothing,
     outTest=testId,
     outChecksum=SHA1 checksum }
 
@@ -325,7 +328,7 @@ checkOrInsertEvaluation repoDir chan out = do
       case resultOrException of
         Right (Left _) -> do
           err chan "Cannot parse options, check the challenge repo"
-        Right (Right (_, Just [result])) -> do
+        Right (Right (_, Just [(_, [result])])) -> do
           msg chan $ concat [ "Evaluated! Score ", (T.pack $ show result) ]
           time <- liftIO getCurrentTime
           _ <- runDB $ insert $ Evaluation {
@@ -342,7 +345,7 @@ checkOrInsertEvaluation repoDir chan out = do
         Left exception -> do
           err chan $ "Evaluation failed: " ++ (T.pack $ show exception)
 
-rawEval :: FilePath -> Metric -> FilePath -> Text -> IO (Either GEvalException (Either (ParserResult GEvalOptions) (GEvalOptions, Maybe [MetricValue])))
+rawEval :: FilePath -> Metric -> FilePath -> Text -> IO (Either GEvalException (Either (ParserResult GEvalOptions) (GEvalOptions, Maybe [(SourceSpec, [MetricValue])])))
 rawEval challengeDir metric repoDir name = Import.try (runGEvalGetOptions [
                                                           "--alt-metric", (show metric),
                                                           "--expected-directory", challengeDir,
diff --git a/add-variants.sql b/add-variants.sql
new file mode 100644
index 0000000..82b144e
--- /dev/null
+++ b/add-variants.sql
@@ -0,0 +1,9 @@
+
+insert into variant(submission, name) select id, 'out' from submission;
+
+update out
+set variant=subquery.variant_id
+from (select O.id as out_id, V.id as variant_id
+      from out as O, variant as V, submission as S
+      where V.submission = S.id and O.submission = S.id) AS subquery
+where out.id = subquery.out_id;
diff --git a/config/models b/config/models
index cc32007..93eeda4 100644
--- a/config/models
+++ b/config/models
@@ -59,6 +59,10 @@ Submission
     isPublic Bool default=False
     isHidden Bool Maybe
     UniqueSubmissionRepoCommitChallenge repo commit challenge
+Variant
+    submission SubmissionId
+    name Text
+    UniqueVariantSubmissionName submission name
 Fork
     source SubmissionId
     target SubmissionId
@@ -77,6 +81,7 @@ Comment
     text Textarea
 Out
     submission SubmissionId
+    variant VariantId Maybe
     test TestId
     checksum SHA1
     UniqueOutSubmissionTestChecksum submission test checksum
diff --git a/gonito.cabal b/gonito.cabal
index cf81981..bd42688 100644
--- a/gonito.cabal
+++ b/gonito.cabal
@@ -122,7 +122,7 @@ library
                  , filemanip
                  , cryptohash
                  , markdown
-                 , geval >= 1.0.0.0
+                 , geval >= 1.1.0.0 && < 1.2
                  , filepath
                  , yesod-table
                  , regex-tdfa