diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..0166a72
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,28 @@
+name: CI
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: cachix/install-nix-action@v27
+        with:
+          extra_nix_config: |
+            accept-flake-config = true
+            extra-substituters = https://cache.iog.io https://purescript-lua.cachix.org
+            extra-trusted-public-keys = hydra.iohk.io:f/Ea+s+dFdN+3Y/G+FDgSq+a5NEWhJGzdjvKNGv0/EQ= purescript-lua.cachix.org-1:yLs4ei2HtnuPtzLekOrW3xdfm95+Etw15gwgyIGTayA=
+
+      - name: Build
+        run: nix develop -c ./scripts/build
+
+      - name: Test
+        run: if [ -f scripts/test ]; then nix develop -c ./scripts/test; fi
+
+      - name: Luacheck
+        run: nix develop -c luacheck --quiet --std min --globals ngx -- src/
diff --git a/flake.lock b/flake.lock
index c5b7aff..14b2fac 100644
--- a/flake.lock
+++ b/flake.lock
@@ -101,35 +101,35 @@
         "type": "github"
       }
     },
-    "easyps": {
+    "flake-compat": {
       "flake": false,
       "locked": {
-        "lastModified": 1710161569,
-        "narHash": "sha256-lcIRIOFCdIWEGyKyG/tB4KvxM9zoWuBRDxW+T+mvIb0=",
-        "owner": "justinwoo",
-        "repo": "easy-purescript-nix",
-        "rev": "117fd96acb69d7d1727df95b6fde9d8715e031fc",
+        "lastModified": 1672831974,
+        "narHash": "sha256-z9k3MfslLjWQfnjBtEtJZdq3H7kyi2kQtUThfTgdRk0=",
+        "owner": "input-output-hk",
+        "repo": "flake-compat",
+        "rev": "45f2638735f8cdc40fe302742b79f248d23eb368",
         "type": "github"
       },
       "original": {
-        "owner": "justinwoo",
-        "repo": "easy-purescript-nix",
+        "owner": "input-output-hk",
+        "ref": "hkm/gitlab-fix",
+        "repo": "flake-compat",
         "type": "github"
       }
     },
-    "flake-compat": {
+    "flake-compat_2": {
       "flake": false,
       "locked": {
-        "lastModified": 1672831974,
-        "narHash": "sha256-z9k3MfslLjWQfnjBtEtJZdq3H7kyi2kQtUThfTgdRk0=",
-        "owner": "input-output-hk",
+        "lastModified": 1765121682,
+        "narHash": "sha256-4VBOP18BFeiPkyhy9o4ssBNQEvfvv1kXkasAYd0+rrA=",
+        "owner": "edolstra",
         "repo": "flake-compat",
-        "rev": "45f2638735f8cdc40fe302742b79f248d23eb368",
+        "rev": "65f23138d8d09a92e30f1e5c87611b23ef451bf3",
         "type": "github"
       },
       "original": {
-        "owner": "input-output-hk",
-        "ref": "hkm/gitlab-fix",
+        "owner": "edolstra",
         "repo": "flake-compat",
         "type": "github"
       }
@@ -543,11 +543,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1712963716,
-        "narHash": "sha256-WKm9CvgCldeIVvRz87iOMi8CFVB1apJlkUT4GGvA0iM=",
+        "lastModified": 1781074563,
+        "narHash": "sha256-md8WlXOlfnIeHeOScMTTHFyf2d6iaTwPl2apR5EQ3P4=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "cfd6b5fc90b15709b780a5a1619695a88505a176",
+        "rev": "9ae611a455b90cf061d8f332b977e387bda8e1ca",
         "type": "github"
       },
       "original": {
@@ -758,12 +758,33 @@
         "type": "github"
       }
     },
+    "purescript-overlay": {
+      "inputs": {
+        "flake-compat": "flake-compat_2",
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1780972251,
+        "narHash": "sha256-PwHYPpfLP+WjSwj765zJ1N0Xp4ET3+8vRqxJ031ua3M=",
+        "owner": "thomashoneyman",
+        "repo": "purescript-overlay",
+        "rev": "1cf88ab9d83596db0e0c0d304a16809c410e2917",
+        "type": "github"
+      },
+      "original": {
+        "owner": "thomashoneyman",
+        "repo": "purescript-overlay",
+        "type": "github"
+      }
+    },
     "root": {
       "inputs": {
-        "easyps": "easyps",
         "flake-utils": "flake-utils",
         "nixpkgs": "nixpkgs",
-        "pslua": "pslua"
+        "pslua": "pslua",
+        "purescript-overlay": "purescript-overlay"
       }
     },
     "stackage": {
diff --git a/flake.nix b/flake.nix
index 96eee34..e76ce41 100644
--- a/flake.nix
+++ b/flake.nix
@@ -4,33 +4,45 @@
   inputs = {
     flake-utils.url = "github:numtide/flake-utils";
     nixpkgs.url = "nixpkgs/nixos-unstable";
-    easyps = {
-      url = "github:justinwoo/easy-purescript-nix";
-      flake = false;
+    purescript-overlay = {
+      url = "github:thomashoneyman/purescript-overlay";
+      inputs.nixpkgs.follows = "nixpkgs";
     };
     pslua.url = "github:Unisay/purescript-lua";
   };
 
-  outputs = { self, nixpkgs, flake-utils, easyps, pslua }:
+  outputs = { self, nixpkgs, flake-utils, purescript-overlay, pslua }:
     flake-utils.lib.eachDefaultSystem (system:
       let
-        p = nixpkgs.legacyPackages.${system};
-        e = import easyps { pkgs = p; };
-        l = p.lua51Packages;
+        pkgs = import nixpkgs {
+          inherit system;
+          overlays = [ purescript-overlay.overlays.default ];
+        };
       in {
-        devShell = p.mkShell {
-          buildInputs = [
-              p.dhall
-              l.lua
-              l.luacheck
-              p.luaformatter
-              pslua.packages.${system}.default
-              e.purs-0_15_15
-              e.purs-tidy
-              e.spago
-              p.treefmt
-            ];
+        devShell = pkgs.mkShell {
+          buildInputs = with pkgs; [
+            dhall
+            lua51Packages.lua
+            lua51Packages.luacheck
+            luaformatter
+            nixfmt-rfc-style
+            pslua.packages.${system}.default
+            purs-bin.purs-0_15_16
+            spago-bin.spago-0_21_0
+            treefmt
+          ];
         };
       });
-}
 
+  # --- Flake Local Nix Configuration ----------------------------
+  nixConfig = {
+    extra-substituters = [
+      "https://cache.iog.io"
+      "https://purescript-lua.cachix.org"
+    ];
+    extra-trusted-public-keys = [
+      "hydra.iohk.io:f/Ea+s+dFdN+3Y/G+FDgSq+a5NEWhJGzdjvKNGv0/EQ="
+      "purescript-lua.cachix.org-1:yLs4ei2HtnuPtzLekOrW3xdfm95+Etw15gwgyIGTayA="
+    ];
+  };
+}
diff --git a/scripts/build b/scripts/build
index c9c7f1f..e23d5db 100755
--- a/scripts/build
+++ b/scripts/build
@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+set -euo pipefail
 
 echo "Building..."