diff --git a/.gitignore b/.gitignore
index 1517c94..42eb368 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,6 @@
-.direnv
+.direnv/
+dist/
+node_modules/
 
 # nixago: ignore-linked-files
 /treefmt.toml
diff --git a/Justfile b/Justfile
new file mode 100644
index 0000000..bd857bf
--- /dev/null
+++ b/Justfile
@@ -0,0 +1,15 @@
+@default:
+    just --choose
+
+format:
+    treefmt
+    just --fmt --unstable
+
+build: generate-colors generate-theme
+
+generate-colors: format
+    node src/generate.mjs
+
+generate-theme: format
+    mkdir -p dist
+    cp src/theme.css dist/
diff --git a/flake.nix b/flake.nix
index bcb993d..70495e2 100644
--- a/flake.nix
+++ b/flake.nix
@@ -29,7 +29,8 @@
           # Shell
           default = pkgs.mkShell {
             packages = [
-              pkgs.deno
+              pkgs.just
+              pkgs.nodejs_20
             ]
             ++ project-config.packages;
 
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..e430212
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,30 @@
+{
+  "name": "@priduck-color-theme/base",
+  "version": "0.0.0",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "@priduck-color-theme/base",
+      "version": "0.0.0",
+      "license": "MIT",
+      "dependencies": {
+        "mkdirp": "^3.0.1"
+      }
+    },
+    "node_modules/mkdirp": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-3.0.1.tgz",
+      "integrity": "sha512-+NsyUUAZDmo6YVHzL/stxSu3t9YS1iljliy3BSDrXJ/dkn1KYdmtZODGGjLcc9XLgVVpH4KshHB8XmZgMhaBXg==",
+      "bin": {
+        "mkdirp": "dist/cjs/src/bin.js"
+      },
+      "engines": {
+        "node": ">=10"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/isaacs"
+      }
+    }
+  }
+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..76db3bc
--- /dev/null
+++ b/package.json
@@ -0,0 +1,22 @@
+{
+  "name": "@priduck-color-theme/base",
+  "version": "0.0.0",
+  "description": "A color-theme based on a single hue in the LCH colorspace.",
+  "main": "dist/index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://src.mfgames.com/priduck-color-theme/priduck-color-theme-base-css.git"
+  },
+  "keywords": [
+    "css",
+    "color"
+  ],
+  "author": "D. Moonfire",
+  "license": "MIT",
+  "dependencies": {
+    "mkdirp": "^3.0.1"
+  }
+}
diff --git a/src/cli.ts b/src/generate.mjs
similarity index 55%
rename from src/cli.ts
rename to src/generate.mjs
index ddfe1e2..2f26e49 100644
--- a/src/cli.ts
+++ b/src/generate.mjs
@@ -1,8 +1,18 @@
-// We need an empty export for top-level await.
-export {};
+import { mkdirp } from "mkdirp";
+import { fileURLToPath } from "url";
+import path from "path";
+import fs from "node:fs/promises";
+
+// Figure out where we need to write the files.
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+const distPath = __dirname + "/../dist";
+
+console.log("writing", distPath);
+
+await mkdirp(distPath);
 
 // Start with the basic CSS header.
-let lines: string[] = [":root {"];
+let lines = [":root {"];
 
 // We have ten colors, with 0 being the base hue and the others being evenly
 // rotated around the color wheel.
@@ -14,7 +24,7 @@ for (let color = 0; color < 10; color++) {
   // to very light.
   for (let brightness = 0; brightness < 10; brightness++) {
     // We use a standard code (--color-cXbY) for our codes.
-    const code = `--color-c${color}b${brightness}`;
+    const code = `--color-priduck-c${color}b${brightness}`;
 
     // Figure out the ramps we are using for brighteness.
     const l = brightness * 11;
@@ -24,7 +34,7 @@ for (let color = 0; color < 10; color++) {
     lines.push(
       `  ${code}: lch(${l.toFixed(1)} ${s.toFixed(
         1,
-      )} calc(var(--color-hue) + ${rotation}));`,
+      )} calc(var(--color-priduck-hue) + ${rotation}));`,
     );
   }
 }
@@ -33,6 +43,8 @@ for (let color = 0; color < 10; color++) {
 lines.push("}");
 
 // Write out the files.
-const text = new TextEncoder().encode(lines.join("\n"));
+const colorsPath = path.join(distPath, "colors.css");
 
-await Deno.writeFile("src/colors.css", text, { mode: 0o644 });
+await fs.writeFile(colorsPath, Buffer.from(lines.join("\n")));
+
+console.log("wrote", colorsPath);