diff --git a/default.nix b/default.nix
index faed7e2635403..bdab048245e21 100644
--- a/default.nix
+++ b/default.nix
@@ -1,6 +1,8 @@
-let requiredVersion = import ./lib/minver.nix; in
+let
+  requiredVersion = import ./lib/minver.nix;
+in
 
-if ! builtins ? nixVersion || builtins.compareVersions requiredVersion builtins.nixVersion == 1 then
+if !builtins ? nixVersion || builtins.compareVersions requiredVersion builtins.nixVersion == 1 then
 
   abort ''