try flake

.envrc

@@ -1,3 +1,11 @@
-source_url "https://raw.githubusercontent.com/cachix/devenv/d1f7b48e35e6dee421cfd0f51481d17f77586997/direnvrc" "sha256-YBzqskFZxmNb3kYVoKD9ZixoPXJh1C9ZvTLGFRkauZ0="
+if ! has nix_direnv_version || ! nix_direnv_version 2.2.1; then
+  source_url "https://raw.githubusercontent.com/nix-community/nix-direnv/2.2.1/direnvrc" "sha256-zelF0vLbEl5uaqrfIzbgNzJWGmLzCmYAkInj/LNxvKs="
+fi
 
-use devenv
+nix_direnv_watch_file devenv.nix
+nix_direnv_watch_file devenv.lock
+nix_direnv_watch_file devenv.yaml
+if ! use flake . --impure
+then
+  echo "devenv could not be built. The devenv environment was not loaded. Make the necessary changes to devenv.nix and hit enter to try again." >&2
+fi

.github/actions/devenv/action.yml

@@ -5,8 +5,6 @@ runs:
   steps:
     - name: Install Nix
       uses: nixbuild/nix-quick-install-action@v25
-      with:
-        load_nixConfig: false
 
     - name: Restore and cache Nix store
       uses: nix-community/cache-nix-action@v3

flake.nix

@@ -0,0 +1,75 @@
+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    systems.url = "github:nix-systems/default";
+    devenv.url = "github:cachix/devenv/python-rewrite";
+  };
+
+  nixConfig = {
+    extra-trusted-public-keys = "devenv.cachix.org-1:w1cLUi8dv3hnoSPGAuibQv+f9TZLr6cv/Hm9XgU50cw=";
+    extra-substituters = "https://devenv.cachix.org";
+  };
+
+  outputs = { self, nixpkgs, devenv, systems, ... } @ inputs:
+    let
+      forEachSystem = nixpkgs.lib.genAttrs (import systems);
+    in
+    {
+      devShells = forEachSystem
+        (system:
+          let
+            pkgs = nixpkgs.legacyPackages.${system};
+          in
+          {
+            default = devenv.lib.mkShell {
+              inherit inputs pkgs;
+              modules = [
+                {
+                  # https://devenv.sh/basics/
+                  env.PLAYWRIGHT_BROWSERS_PATH="${pkgs.playwright-driver.browsers}";
+
+                  # https://devenv.sh/packages/
+                  packages = [
+                    pkgs.infisical
+                    pkgs.git
+                    pkgs.playwright-driver
+                  ];
+
+                  # https://devenv.sh/services/
+                  services.postgres = {
+                    enable = true;
+                    package = pkgs.postgresql_16;
+                    initialDatabases = [{ name = "acme"; }];
+                    listen_addresses = "localhost";
+                    port = 2345;
+                    initialScript = ''
+                      CREATE USER postgres SUPERUSER;
+                    '';
+                  };
+
+                  # https://devenv.sh/scripts/
+                  # scripts.hello.exec = "echo hello from $GREET";
+
+                  # enterShell = ''
+                  #   hello
+                  #   git --version
+                  # '';
+
+                  # https://devenv.sh/languages/
+                  languages.javascript.enable = true;
+                  languages.javascript.package = pkgs.nodejs_18;
+                  languages.javascript.corepack.enable = true;
+
+                  # https://devenv.sh/pre-commit-hooks/
+                  # pre-commit.hooks.shellcheck.enable = true;
+
+                  # https://devenv.sh/processes/
+                  # processes.ping.exec = "ping example.com";
+
+                  # See full reference at https://devenv.sh/reference/options/
+                }
+              ];
+            };
+          });
+    };
+}