Use import-tree to import modules from a directory

nix/flakes/import-tree/modules/dev-shell.nix

@@ -0,0 +1,16 @@
+{ inputs, ... }:
+
+{
+  imports = [ inputs.devshell.flakeModule ];
+
+  perSystem =
+    { pkgs, ... }:
+    {
+      devshells.default.packages = with pkgs; [
+        go
+        php
+        phpPackages.composer
+        tailwindcss
+      ];
+    };
+}