diff --git a/.gitignore b/.gitignore
index 9f5210f6..afc0453f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,5 +5,8 @@
 **/.DS_Store
 .smithy.lsp.log
 .sbt
+**/node_modules
 smithyql-log.txt
+
+result
 .version
diff --git a/build.sbt b/build.sbt
index c2e02021..76a0d945 100644
--- a/build.sbt
+++ b/build.sbt
@@ -73,7 +73,7 @@ val commonSettings = Seq(
       Nil
   },
   Test / scalacOptions += "-Wconf:cat=deprecation:silent,msg=Specify both message and version:silent",
-  scalacOptions ++= Seq("-release", "11"),
+  scalacOptions += "-release:11",
   mimaFailOnNoPrevious := false,
 )
 
@@ -143,6 +143,8 @@ lazy val examples = module("examples")
       "com.disneystreaming.smithy4s" %% "smithy4s-aws-kernel" % smithy4sVersion.value,
     ),
     publish := false,
+    // generated code
+    scalacOptions += "-Wconf:cat=deprecation:silent",
   )
   .enablePlugins(Smithy4sCodegenPlugin)
 
diff --git a/flake.lock b/flake.lock
index 1c25de58..42bd7c08 100644
--- a/flake.lock
+++ b/flake.lock
@@ -20,15 +20,16 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1713905099,
-        "narHash": "sha256-6+M6qG/7PmDxYeXdutxS6gcS2MQR50ilEaIcNwnAmto=",
+        "lastModified": 1730272153,
+        "narHash": "sha256-B5WRZYsRlJgwVHIV6DvidFN7VX7Fg9uuwkRW9Ha8z+w=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "0e7e9561350c68125627534b7c0f2d3cd5d32151",
+        "rev": "2d2a9ddbe3f2c00747398f3dc9b05f7f2ebb0f53",
         "type": "github"
       },
       "original": {
         "owner": "nixos",
+        "ref": "nixpkgs-unstable",
         "repo": "nixpkgs",
         "type": "github"
       }
diff --git a/flake.nix b/flake.nix
index 9afa5030..35a33a30 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,27 +1,17 @@
 {
   inputs = {
-    nixpkgs.url = "github:nixos/nixpkgs";
+    nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
     flake-utils.url = "github:numtide/flake-utils";
   };
 
-  outputs = { self, nixpkgs, flake-utils, ... }@inputs:
+  outputs = { nixpkgs, flake-utils, ... }:
     flake-utils.lib.eachDefaultSystem (
       system:
       let
-        pkgs = import nixpkgs {
-          inherit system;
-          overlays = [
-            (final: prev:
-              let
-                jre = final.openjdk11;
-                jdk = jre;
-              in
-              { inherit jdk jre; })
-          ];
-        };
+        pkgs = import nixpkgs { inherit system; };
       in
       {
-        devShell = pkgs.mkShell {
+        devShells.default = pkgs.mkShell {
           buildInputs = [
             pkgs.yarn
             pkgs.nodejs