Run nixpkgs-fmt .

https://github.com/nix-community/nixpkgs-fmt

ci.nix

@@ -12,9 +12,7 @@
 { pkgs ? import <nixpkgs> { } }:
 
 with builtins;
-
 let
-
   isReserved = n: n == "lib" || n == "overlays" || n == "modules";
   isDerivation = p: isAttrs p && p ? type && p.type == "derivation";
   isBuildable = p: !(p.meta.broken or false) && p.meta.license.free or true;
@@ -46,7 +44,6 @@ let
             (attrNames nurAttrs))));
 
 in
-
 rec {
   buildPkgs = filter isBuildable nurPkgs;
   cachePkgs = filter isCacheable buildPkgs;

default.nix

@@ -18,4 +18,3 @@
   # some-qt5-package = pkgs.libsForQt5.callPackage ./pkgs/some-qt5-package { };
   # ...
 }
-

lib/default.nix

@@ -5,4 +5,3 @@ with pkgs.lib; {
   #
   # hexint = x: hexvals.${toLower x};
 }
-

modules/default.nix

@@ -3,4 +3,3 @@
   #
   # my-module = ./my-module;
 }
-

overlay.nix

@@ -3,15 +3,12 @@
 # configuration.
 
 self: super:
-
 let
-
   isReserved = n: n == "lib" || n == "overlays" || n == "modules";
   nameValuePair = n: v: { name = n; value = v; };
   nurAttrs = import ./default.nix { pkgs = super; };
 
 in
-
 builtins.listToAttrs
   (map (n: nameValuePair n nurAttrs.${n})
     (builtins.filter (n: !isReserved n)

overlays/default.nix

@@ -3,4 +3,3 @@
   #
   # my-overlay = import ./my-overlay;
 }
-

pkgs/example-package/default.nix

@@ -7,4 +7,3 @@ stdenv.mkDerivation rec {
   buildPhase = "echo echo Hello World > example";
   installPhase = "install -Dm755 example $out";
 }
-