chore(nix): apply formatting with nixpkgs-fmt

dev.nix

@@ -1,11 +1,12 @@
-{ pkgs ? import <nixpkgs> {} }:
+{ pkgs ? import <nixpkgs> { } }:
 
 pkgs.mkShell {
   buildInputs = [
     pkgs.curl
     pkgs.git
     pkgs.lune
-    (let version = "6.0-28"; in pkgs.stdenv.mkDerivation {
+    (
+      let version = "6.0-28"; in pkgs.stdenv.mkDerivation {
         name = "unzip-${version}";
         src = pkgs.fetchurl {
           url = "http://ftp.debian.org/debian/pool/main/u/unzip/unzip_${version}_amd64.deb";
@@ -27,7 +28,8 @@ pkgs.mkShell {
           cp $(pkg-config --variable=libdir bzip2)/libbz2.so.1.0.8 $out/lib/libbz2.so.1.0
           rm -rf $out/usr tmp/
         '';
-    })
+      }
+    )
   ];
 
   shellHook = ''

flake.nix

@@ -11,7 +11,8 @@
       devpkgs = import ./dev.nix {
         inherit pkgs;
       };
-    in {
+    in
+    {
       packages.${system}.devShell = devpkgs;
       defaultPackage.${system} = devpkgs;
     };