bump nixpkgs version

Main.hs

@@ -16,7 +16,7 @@ import qualified Data.Time.Format              as T
 import           Relude                  hiding ( intercalate
                                                 , zip
                                                 )
-import           System.Environment             ( getArgs )
+import           System.Environment ()
 import           System.FilePattern.Directory   ( getDirectoryFiles )
 import           Text.Atom.Feed
 import           Text.Atom.Feed.Export          ( textFeed )
@@ -101,8 +101,7 @@ logFolder = "/home/maralorn/logs/"
 main :: IO ()
 main = do
   now <- T.getCurrentTime
-  let getFiles = \t p ->
-        L.groupSortOn (\x -> (channel x, server x))
+  let getFiles t p = L.groupSortOn (\x -> (channel x, server x))
           .   mapMaybe ((\x -> MP.parseMaybe (p x) x) . toText)
           <$> getDirectoryFiles
                 (toString logFolder)

default.nix

@@ -1,2 +1,3 @@
 { pkgs ? import (import nix/sources.nix).nixpkgs {} }:
-pkgs.haskellPackages.callCabal2nix "logfeed" ./. {}
+with pkgs; with haskell.lib; with haskellPackages;
+callCabal2nix "logfeed" ./. { purebred-email = doJailbreak (unmarkBroken (dontCheck purebred-email)); }

nix/sources.json

@@ -5,10 +5,10 @@
         "homepage": "",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "20887e4bbfdae3aed6bfa1f53ddf138ee325515e",
-        "sha256": "0hc79sv59appb7bynz5bzyqvrapyjdq63s79i649vxl93504kmnv",
+        "rev": "f1c167688a6f81f4a51ab542e5f476c8c595e457",
+        "sha256": "00ac3axj7jdfcajj3macdydf9w9bvqqvgrqkh1xxr3rfi9q2fz1v",
         "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs/archive/20887e4bbfdae3aed6bfa1f53ddf138ee325515e.tar.gz",
+        "url": "https://github.com/NixOS/nixpkgs/archive/f1c167688a6f81f4a51ab542e5f476c8c595e457.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     }
 }

nix/sources.nix

@@ -31,8 +31,28 @@ let
           if spec ? branch then "refs/heads/${spec.branch}" else
             if spec ? tag then "refs/tags/${spec.tag}" else
               abort "In git source '${name}': Please specify `ref`, `tag` or `branch`!";
+      submodules = if spec ? submodules then spec.submodules else false;
+      submoduleArg =
+        let
+          nixSupportsSubmodules = builtins.compareVersions builtins.nixVersion "2.4" >= 0;
+          emptyArgWithWarning =
+            if submodules == true
+            then
+              builtins.trace
+                (
+                  "The niv input \"${name}\" uses submodules "
+                  + "but your nix's (${builtins.nixVersion}) builtins.fetchGit "
+                  + "does not support them"
+                )
+                {}
+            else {};
+        in
+          if nixSupportsSubmodules
+          then { inherit submodules; }
+          else emptyArgWithWarning;
     in
-      builtins.fetchGit { url = spec.repo; inherit (spec) rev; inherit ref; };
+      builtins.fetchGit
+        ({ url = spec.repo; inherit (spec) rev; inherit ref; } // submoduleArg);
 
   fetch_local = spec: spec.path;