diff --git a/.gitignore b/.gitignore
index 9bae5a1..6ea87b6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,6 +3,7 @@
 /.spago/
 /.psc*
 /.psa*
+/insect.js
 /docs/insect.1
 /web/*.js
 /web/terminal.css
diff --git a/.npmignore b/.npmignore
deleted file mode 100644
index 3410604..0000000
--- a/.npmignore
+++ /dev/null
@@ -1,14 +0,0 @@
-/.github/
-# `deploy.sh` is a local script used by @sharkdp to push the latest version of
-# Insect to https://insect.sh.
-/deploy.sh
-/docs/*.md
-/docs/*.sh
-/docs/template.readme
-/node_modules/
-/output
-/web
-/benchmarks/results/
-/benchmarks/results.json
-/benchmarks/results.md
-/.purs-repl
diff --git a/index.js b/index.js
index f7d8375..fefe501 100755
--- a/index.js
+++ b/index.js
@@ -1,6 +1,6 @@
 #!/usr/bin/env node
 
-import * as Insect from "./output/Insect/index.js";
+import * as Insect from "./insect.js";
 import * as path from "path";
 
 var insectEnv = Insect.initialEnvironment;
@@ -45,24 +45,27 @@ if (process.argv.length >= 4) {
 }
 
 if (process.env.INSECT_NO_RC !== "true") {
-  var [os, lineReader] = await Promise.all([import("os"), import("line-reader")]);
+  // Node 12 does not support top-level await.
+  (async function() {
+    var [os, lineReader] = await Promise.all([import("os"), import("line-reader")]);
 
-  var rcFile = path.join(os.homedir(), ".insectrc");
-  lineReader.eachLine(rcFile, function (line) {
-    var res = runInsect(Insect.fmtPlain, line);
-    // We really only care when it breaks
-    if (res && res.msgType === "error") {
-      console.error(res.msg);
-      process.exit(1);
-    }
-  }, function (err) {
-    // If the file doesn't exist, that's fine
-    if (err && err.code !== "ENOENT") {
-      throw err;
-    } else {
-      startInsect();
-    }
-  });
+    var rcFile = path.join(os.homedir(), ".insectrc");
+    lineReader.eachLine(rcFile, function (line) {
+      var res = runInsect(Insect.fmtPlain, line);
+      // We really only care when it breaks
+      if (res && res.msgType === "error") {
+        console.error(res.msg);
+        process.exit(1);
+      }
+    }, function (err) {
+      // If the file doesn't exist, that's fine
+      if (err && err.code !== "ENOENT") {
+        throw err;
+      } else {
+        startInsect();
+      }
+    });
+  })();
 } else {
   startInsect();
 }
diff --git a/package.json b/package.json
index 9e4d477..af19656 100644
--- a/package.json
+++ b/package.json
@@ -18,16 +18,18 @@
     "test": "test"
   },
   "files": [
-    "output",
+    "insect.js",
     "web/media/insect.png"
   ],
   "scripts": {
     "setup": "npm run build",
     "start": "node copy && run-p server esbuild:watch",
-    "esbuild:watch": "spago build -w --then 'npm run esbuild'",
-    "esbuild": "esbuild output/Insect/index.js --bundle --minify --outfile=web/insect.js --target=es6 --global-name=Insect",
+    "esbuild:watch": "spago build -w --then 'npm run esbuild:browser'",
+    "esbuild": "npm run esbuild:browser && npm run esbuild:node",
+    "esbuild:browser": "esbuild output/Insect/index.js --bundle --minify --outfile=web/insect.js --target=es6 --global-name=Insect",
+    "esbuild:node": "esbuild output/Insect/index.js --bundle --minify --outfile=insect.js --target=node12 --platform=node --format=esm --external:./node_modules/*",
     "build": "spago build && npm run esbuild && node copy",
-    "prepack": "npm run build",
+    "prepack": "spago build && npm run esbuild:node",
     "server": "live-server web --open",
     "test": "spago test"
   },