diff --git a/nix/sources.nix b/nix/sources.nix
index f4feac5..6963775 100644
--- a/nix/sources.nix
+++ b/nix/sources.nix
@@ -39,16 +39,20 @@ let
             if submodules == true
             then
               builtins.trace
-                ("The niv input \"${name}\" uses submodules "
+                (
+                  "The niv input \"${name}\" uses submodules "
                   + "but your nix's (${builtins.nixVersion}) builtins.fetchGit "
-                  + "does not support them")
-                { }
-            else { };
+                  + "does not support them"
+                )
+                {}
+            else {};
         in
-        if nixSupportsSubmodules then { inherit submodules; } else emptyArgWithWarning;
+          if nixSupportsSubmodules
+          then { inherit submodules; }
+          else emptyArgWithWarning;
     in
-    builtins.fetchGit
-      ({ url = spec.repo; inherit (spec) rev; inherit ref; } // submoduleArg);
+      builtins.fetchGit
+        ({ url = spec.repo; inherit (spec) rev; inherit ref; } // submoduleArg);
 
   fetch_local = spec: spec.path;
 
@@ -163,14 +167,17 @@ let
 
   # Create the final "sources" from the config
   mkSources = config:
-    mapAttrs (
-      name: spec:
-        if builtins.hasAttr "outPath" spec
-        then abort
-          "The values in sources.json should not have an 'outPath' attribute"
-        else
-          spec // { outPath = replace name (fetch config.pkgs name spec); }
-    ) config.sources;
+    mapAttrs
+      (
+        name: spec:
+          if builtins.hasAttr "outPath" spec
+          then
+            abort
+              "The values in sources.json should not have an 'outPath' attribute"
+          else
+            spec // { outPath = replace name (fetch config.pkgs name spec); }
+      )
+      config.sources;
 
   # The "config" used by the fetchers
   mkConfig =
diff --git a/src/Niv/Sources.hs b/src/Niv/Sources.hs
index 0f8c903..fcb6d3c 100644
--- a/src/Niv/Sources.hs
+++ b/src/Niv/Sources.hs
@@ -248,7 +248,7 @@ sourcesVersionToMD5 = \case
   V24 -> "116c2d936f1847112fef0013771dab28"
   V25 -> "6612caee5814670e5e4d9dd1b71b5f70"
   V26 -> "937bff93370a064c9000f13cec5867f9"
-  V27 -> "d18bcf549896edd810c6b7fd6239bcf7"
+  V27 -> "8eb15aa505d1971b1593c3ba3a9e8646"
 
 -- | The MD5 sum of ./nix/sources.nix
 sourcesNixMD5 :: IO T.Text