split nix flake config in separate files

flake.nix

@@ -14,72 +14,14 @@
     };
   };
   outputs = {
-    self,
     nixpkgs,
     flake-utils,
-    pre-commit-hooks,
     ...
-  }:
+  } @ inputs:
     flake-utils.lib.eachDefaultSystem (
-      system: let
-        pkgs = nixpkgs.legacyPackages.${system};
-      in {
-        checks = {
-          pre-commit-check = pre-commit-hooks.lib.${system}.run {
-            src = flake-utils.lib.cleanSource ./.;
-            hooks = {
-              alejandra.enable = true;
-              nix-linter.enable = true;
-              statix .enable = true;
-            };
-            settings.nix-linter.checks = [
-              "DIYInherit"
-              "EmptyInherit"
-              "EmptyLet"
-              "EtaReduce"
-              "LetInInheritRecset"
-              "ListLiteralConcat"
-              "NegateAtom"
-              "SequentialLet"
-              "SetLiteralUpdate"
-              "UnfortunateArgName"
-              "UnneededRec"
-              "UnusedArg"
-              "UnusedLetBind"
-              "UpdateEmptySet"
-              "BetaReduction"
-              "EmptyVariadicParamSet"
-              "UnneededAntiquote"
-              "no-FreeLetInFunc"
-              "no-AlphabeticalArgs"
-              "no-AlphabeticalBindings"
-            ];
-          };
-        };
-        devShell = with pkgs;
-          mkShell {
-            name = "srx.nix.astro";
-            nativeBuildInputs = with pkgs; [
-              alejandra
-              editorconfig-checker
-              git
-              nix-linter
-              pre-commit
-              rnix-lsp
-              vscodium-fhs
-              yarn
-              nodejs
-            ];
-            postInstall = '''';
-            shellHook = ''
-              ${self.checks.${system}.pre-commit-check.shellHook}
-            '';
-          };
-
-        hydraJobs = {};
-
-        # packages.default = self.packages.${system};
-
+      system: {
+        checks = import ./nix/checks.nix inputs system;
+        devShells.default = import ./nix/shell.nix inputs system;
         pkgs = import nixpkgs {
           inherit system;
           config.allowUnfree = true;

nix/checks.nix

@@ -0,0 +1,39 @@
+{
+  self,
+  pre-commit-hooks,
+  ...
+}: system:
+with self.pkgs.${system}; {
+  pre-commit-check =
+    pre-commit-hooks.lib.${system}.run
+    {
+      src = lib.cleanSource ../.;
+      hooks = {
+        alejandra.enable = true;
+        nix-linter.enable = true;
+        statix .enable = true;
+      };
+      settings.nix-linter.checks = [
+        "DIYInherit"
+        "EmptyInherit"
+        "EmptyLet"
+        "EtaReduce"
+        "LetInInheritRecset"
+        "ListLiteralConcat"
+        "NegateAtom"
+        "SequentialLet"
+        "SetLiteralUpdate"
+        "UnfortunateArgName"
+        "UnneededRec"
+        "UnusedArg"
+        "UnusedLetBind"
+        "UpdateEmptySet"
+        "BetaReduction"
+        "EmptyVariadicParamSet"
+        "UnneededAntiquote"
+        "no-FreeLetInFunc"
+        "no-AlphabeticalArgs"
+        "no-AlphabeticalBindings"
+      ];
+    };
+}

nix/shell.nix

@@ -0,0 +1,21 @@
+{self, ...}: system:
+with self.pkgs.${system};
+  mkShell {
+    name = "srx.nix.astro";
+    nativeBuildInputs = with pkgs; [
+      alejandra
+      editorconfig-checker
+      git
+      nix-linter
+      nodejs
+      pre-commit
+      rnix-lsp
+      vscodium-fhs
+      yarn
+      yarn2nix
+    ];
+    postInstall = '''';
+    shellHook = ''
+      ${self.checks.${system}.pre-commit-check.shellHook}
+    '';
+  }