fix: make checks run successfully

flake.nix

@@ -10,7 +10,8 @@
     treefmt-nix.url = "github:numtide/treefmt-nix";
   };
 
-	outputs = { devshell, flake-parts, flake-root, process-compose, treefmt-nix, ... }@inputs:
+  outputs =
+    { flake-parts, ... }@inputs:
     flake-parts.lib.mkFlake { inherit inputs; } {
       imports = [
         inputs.devshell.flakeModule
@@ -26,9 +27,17 @@
         "x86_64-linux"
         "aarch64-linux"
       ];
-		perSystem = { config, pkgs, self', ... }: let
+      perSystem =
+        {
+          config,
+          pkgs,
+          self',
+          ...
+        }:
+        let
           lib = pkgs.lib;
-		in {
+        in
+        {
           # https://numtide.github.io/devshell/intro.html
           devshells.default = {
             commands = [
@@ -63,7 +72,11 @@
                     dockerTools.fakeNss
                     nginx
                   ];
-							pathsToLink = [ "/bin" "/etc" "/var" ];
+                  pathsToLink = [
+                    "/bin"
+                    "/etc"
+                    "/var"
+                  ];
                 })
               ];
               fakeRootCommands = ''
@@ -71,7 +84,13 @@
                 						chmod 0777 tmp
                 					'';
               config = {
-						Cmd = [ (lib.getExe pkgs.nginx) "-c" self'.packages.nginx-config "-e" "stderr" ];
+                Cmd = [
+                  (lib.getExe pkgs.nginx)
+                  "-c"
+                  self'.packages.nginx-config
+                  "-e"
+                  "stderr"
+                ];
                 Port = [ 80 ];
               };
             };
@@ -140,6 +159,10 @@
             settings.formatter = {
             };
           };
+
+          checks = {
+            inherit (self'.packages) default;
+          };
         };
     };
 }