diff --git a/flake.nix b/flake.nix
index 4d6daaf..21b227a 100644
--- a/flake.nix
+++ b/flake.nix
@@ -7,13 +7,7 @@
       flake-utils.lib.eachDefaultSystem (system:
       let pkgs = nixpkgs.legacyPackages.${system}; in
       rec {
-        devShell = pkgs.mkShell {
-          buildInputs = with pkgs; [ lessc minify ];
-
-          shellHook = ''
-            echo "shell with lessc and minify"
-          '';
-        };
+        devShell = import ./shell.nix {inherit pkgs; };
       }
     );
 }
diff --git a/shell.nix b/shell.nix
new file mode 100644
index 0000000..ce3880c
--- /dev/null
+++ b/shell.nix
@@ -0,0 +1,11 @@
+{ pkgs ? import <nixpkgs> {} }:
+with pkgs;
+mkShell {
+  buildInputs = [ 
+    lessc 
+    minify 
+  ];
+  shellHook = '' 
+    echo "shell with lessc and minify"
+    '';
+}