diff --git a/flake.lock b/flake.lock
new file mode 100644
index 000000000..9ce20fffc
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,60 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1694529238,
+        "narHash": "sha256-zsNZZGTGnMOf9YpHKJqMSsa0dXbfmxeoJ7xHlrt+xmY=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "ff7b65b44d01cf9ba6a71320833626af21126384",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1700204040,
+        "narHash": "sha256-xSVcS5HBYnD3LTer7Y2K8ZQCDCXMa3QUD1MzRjHzuhI=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "c757e9bd77b16ca2e03c89bf8bc9ecb28e0c06ad",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "ref": "nixos-unstable",
+        "type": "indirect"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 000000000..039f3d523
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,26 @@
+{
+  description = "Shell for dev";
+
+  inputs = {
+    nixpkgs.url = "nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { flake-utils, self, nixpkgs, ... }: 
+  let
+    system = flake-utils.lib.system.x86_64-linux;
+    pkgs = nixpkgs.legacyPackages.${system};
+  in
+  {
+    devShells.${system}.default = pkgs.mkShell {
+      name = "catcheffect-dev";
+      nativeBuildInputs = [ 
+        pkgs.jdk11
+        pkgs.scalafmt
+        pkgs.zsh
+        pkgs.sbt
+        pkgs.graalvm-ce
+      ];
+    };
+  };
+}
diff --git a/modules/relational-doobie/src/test/scala/gql/relational/DoobieRelationalSuite.scala b/modules/relational-doobie/src/test/scala/gql/relational/DoobieRelationalSuite.scala
index dc56c4ca0..58ce8a418 100644
--- a/modules/relational-doobie/src/test/scala/gql/relational/DoobieRelationalSuite.scala
+++ b/modules/relational-doobie/src/test/scala/gql/relational/DoobieRelationalSuite.scala
@@ -22,6 +22,7 @@ import cats.effect.std.UUIDGen
 import munit.AnyFixture
 import doobie._
 import doobie.implicits._
+import scala.collection.immutable._
 
 class DoobieRelationalSuite extends RelationalSuiteTables(DoobieIntegraion) {
   def intDecoder: Read[Int] = Read[Int]
diff --git a/modules/relational-skunk/src/test/scala/gql/relational/SkunkRelationalSuite.scala b/modules/relational-skunk/src/test/scala/gql/relational/SkunkRelationalSuite.scala
index 9a2af3308..8f938dc83 100644
--- a/modules/relational-skunk/src/test/scala/gql/relational/SkunkRelationalSuite.scala
+++ b/modules/relational-skunk/src/test/scala/gql/relational/SkunkRelationalSuite.scala
@@ -26,6 +26,7 @@ import cats.effect.std.UUIDGen
 import munit.AnyFixture
 import gql.relational.skunk.dsl._
 import skunk.data.TransactionStatus
+import scala.collection.immutable._
 
 class SkunkRelationalSuite extends RelationalSuiteTables(SkunkIntegration) {
   def intDecoder: Decoder[Int] = int4