diff --git a/changes.txt b/changes.txt
--- a/changes.txt
+++ b/changes.txt
@@ -1,3 +1,10 @@
+0.1.3.1
+-------
+
+- Released Sat 01 Aug 2015 20:36:50 CEST
+- Added Nix syntax (.nix) (requested by Tomislav).
+- Added .pl and .sh test files to vcs.
+
 0.1.3.0
 -------
 
diff --git a/lentil.cabal b/lentil.cabal
--- a/lentil.cabal
+++ b/lentil.cabal
@@ -1,5 +1,5 @@
 name:                lentil
-version:             0.1.3.0
+version:             0.1.3.1
 synopsis:            frugal issue tracker
 description:         minumum effort, cohesive issue tracker based on
                      ubiquitous @TODO@s and @FIXME@s conventions.
@@ -22,6 +22,7 @@
                      test/test-files/lang-comm/ruby.rb,
                      test/test-files/lang-comm/perl.pl,
                      test/test-files/lang-comm/shell.sh,
+                     test/test-files/lang-comm/nix.nix,
                      test/test-files/lang-comm/test.txt,
                      test/test-files/lang-comm/text.txt,
                      test/test-files/specific/contiguous.c,
diff --git a/src/Lentil/Parse/Run.hs b/src/Lentil/Parse/Run.hs
--- a/src/Lentil/Parse/Run.hs
+++ b/src/Lentil/Parse/Run.hs
@@ -24,6 +24,7 @@
 import Prelude -- 7.8 hack
 
 
+-- fixme: hGetContents: invalid argument (invalid byte sequence) [u:3]
 
 -- main function with wich to parse issues; errors on stderr
 issueFinder :: [FilePath] -> IO [Issue]
diff --git a/src/Lentil/Parse/Syntaxes.hs b/src/Lentil/Parse/Syntaxes.hs
--- a/src/Lentil/Parse/Syntaxes.hs
+++ b/src/Lentil/Parse/Syntaxes.hs
@@ -1,7 +1,7 @@
 -----------------------------------------------------------------------------
 -- |
 -- Module      :  Lentil.Parse.Syntaxes
--- Copyright   :  © 2015 Francesco Ariis
+-- Copyright   :  © 2015 Francesco Ariis, Tomislav
 -- License     :  GPLv3 (see the LICENSE file)
 --
 -- Languages descriptors
@@ -32,6 +32,7 @@
               | ext `elem` [".rb"]                 = Just ruby
               | ext `elem` [".pl", ".pm", ".t"]    = Just perl
               | ext `elem` [".sh"]                 = Just perl -- shell
+              | ext `elem` [".nix"]                = Just nix
               | ext `elem` [".txt"]                = Just text
               | otherwise                          = Nothing
     where ext = SF.takeExtension fp
@@ -51,5 +52,6 @@
 ruby       = source $ ParSyntax ["#"]  [("=begin",
                                          "=end")]     ['"', '\''] []
 perl       = source $ ParSyntax ["#"]  []             ['"', '\''] []
+nix        = source $ ParSyntax ["#"]  [("/*", "*/")] ['"']       ['\'']
 text       = (:[]) . MultiLine 1 <$> many anyChar
 
diff --git a/src/Main.hs b/src/Main.hs
--- a/src/Main.hs
+++ b/src/Main.hs
@@ -28,7 +28,7 @@
                                    short 'v'      <>
                                    help "show version and copyright info" )
     where
-          versionCopy = "lentil - a frugal issue tracker, version 0.1.3.0\n\
+          versionCopy = "lentil - a frugal issue tracker, version 0.1.3.1\n\
                         \(C) 2015 Francesco Ariis - http://www.ariis.it\n\
                         \released under the GNU General Public License 3\n"
 
@@ -37,7 +37,8 @@
 runLentil :: LOptions -> IO ()
 runLentil lo = uncurry findIssues (loInExcl lo) >>= \is -> -- grab issues
                let fil = filterAnd (loFilters lo) is       -- filtered
-                   ord = chainSorts fil (loSort lo)        -- ordered
+                   -- ord = chainSorts fil (loSort lo)        -- ordered
+                   -- todo leave sort out as now? [design]
 
                    -- which function to use to output stuff (file/term)
                    outFunction :: String -> IO ()
@@ -54,7 +55,7 @@
                in
 
                case loFormat lo of
-                 Pretty -> outFunction (ppIssues bCol ord)
+                 Pretty -> outFunction (ppIssues bCol fil) -- fixme o ord?
                  TagPop -> outFunction (ppPopularity bCol fil)
                  Csv    -> outFunction (issues2CSV fil)
                  Comp   -> outFunction (issues2Compiler fil)
diff --git a/test/Lentil/Parse/RunSpec.hs b/test/Lentil/Parse/RunSpec.hs
--- a/test/Lentil/Parse/RunSpec.hs
+++ b/test/Lentil/Parse/RunSpec.hs
@@ -64,6 +64,9 @@
     it "parses a shell script source" $
         fileParser "test/test-files/lang-comm/shell.sh"
             `shouldReturn` spt "test/test-files/lang-comm/shell.sh"
+    it "parses a Nix source" $
+        fileParser "test/test-files/lang-comm/nix.nix"
+            `shouldReturn` spt "test/test-files/lang-comm/nix.nix"
 
   describe "issueFinder" $ do
     it "reads a file (code or txt) for issues" $
diff --git a/test/test-files/lang-comm/nix.nix b/test/test-files/lang-comm/nix.nix
new file mode 100644
--- /dev/null
+++ b/test/test-files/lang-comm/nix.nix
@@ -0,0 +1,11 @@
+# TODO: single
+# comment
+# todo single2
+
+c = "st/*ring" # string
+letter = 'c' # char
+
+  /* todo block1
+  TODO: block2 [tog] */
+
+#  end