diff --git a/.circleci/scripts/validate-lavamoat-policy.sh b/.circleci/scripts/validate-lavamoat-policy.sh
index d674cd3f0..177fabe0b 100755
--- a/.circleci/scripts/validate-lavamoat-policy.sh
+++ b/.circleci/scripts/validate-lavamoat-policy.sh
@@ -4,7 +4,7 @@ set -e
 set -u
 set -o pipefail
 
-yarn lavamoat:auto
+yarn lavamoat:auto:ci
 
 if git diff --exit-code
 then
diff --git a/README.md b/README.md
index 9b4dd4efa..d3c48b72d 100644
--- a/README.md
+++ b/README.md
@@ -91,15 +91,17 @@ Whenever you change dependencies (adding, removing, or updating, either in `pack
 * The `allow-scripts` configuration in `package.json`
   * Run `yarn allow-scripts auto` to update the `allow-scripts` configuration automatically. This config determines whether the package's install/postinstall scripts are allowed to run. Review each new package to determine whether the install script needs to run or not, testing if necessary.
   * Unfortunately, `yarn allow-scripts auto` will behave inconsistently on different platforms. macOS and Windows users may see extraneous changes relating to optional dependencies.
-* The LavaMoat policy files. The _tl;dr_ is to run `yarn lavamoat:auto` to update these files, but there can be devils in the details. Continue reading for more information.
+* The LavaMoat policy files. The _tl;dr_ is to run `yarn lavamoat:auto` to update these files, but there can be devils in the details:
   * There are two sets of LavaMoat policy files:
-    * The production LavaMoat policy files (`lavamoat/browserify/*/policy.json`), which are re-generated using `yarn lavamoat:background:auto`.
+    * The production LavaMoat policy files (`lavamoat/browserify/*/policy.json`), which are re-generated using `yarn lavamoat:background:auto`. Add `--help` for usage.
       * These should be regenerated whenever the production dependencies for the background change.
     * The build system LavaMoat policy file (`lavamoat/build-system/policy.json`), which is re-generated using `yarn lavamoat:build:auto`.
       * This should be regenerated whenever the dependencies used by the build system itself change.
   * Whenever you regenerate a policy file, review the changes to determine whether the access granted to each package seems appropriate.
   * Unfortunately, `yarn lavamoat:auto` will behave inconsistently on different platforms.
   macOS and Windows users may see extraneous changes relating to optional dependencies.
+  * If you keep getting policy failures even after regenerating the policy files, try regenerating the policies after a clean install by doing:
+    * `rm -rf node_modules/ && yarn setup && yarn lavamoat:auto`
   * Keep in mind that any kind of dynamic import or dynamic use of globals may elude LavaMoat's static analysis.
   Refer to the LavaMoat documentation or ask for help if you run into any issues.
 
diff --git a/development/generate-lavamoat-policies.js b/development/generate-lavamoat-policies.js
new file mode 100644
index 000000000..076b20d64
--- /dev/null
+++ b/development/generate-lavamoat-policies.js
@@ -0,0 +1,53 @@
+const concurrently = require('concurrently');
+const yargs = require('yargs/yargs');
+const { hideBin } = require('yargs/helpers');
+const { BuildType } = require('./lib/build-type');
+
+start().catch((error) => {
+  console.error('Policy generation failed.', error);
+  process.exitCode = 1;
+});
+
+async function start() {
+  const {
+    argv: { buildTypes, parallel },
+  } = yargs(hideBin(process.argv)).usage(
+    '$0 [options]',
+    'Generate the LavaMoat policy file for one more more build types.',
+    (yargsInstance) =>
+      yargsInstance
+        .option('build-types', {
+          alias: ['t'],
+          choices: Object.values(BuildType),
+          default: Object.values(BuildType),
+          demandOption: true,
+          description: 'The build type(s) to generate policy files for.',
+        })
+        .option('parallel', {
+          alias: ['p'],
+          default: true,
+          demandOption: true,
+          description: 'Whether to generate policies in parallel.',
+          type: 'boolean',
+        })
+        .strict(),
+  );
+
+  await concurrently(
+    (Array.isArray(buildTypes) ? buildTypes : [buildTypes]).map(
+      (buildType) => ({
+        command: `yarn build scripts:prod --policy-only --build-type=${buildType}`,
+        env: {
+          WRITE_AUTO_POLICY: 1,
+        },
+        name: buildType,
+      }),
+    ),
+    {
+      killOthers: true,
+      maxProcesses: parallel ? buildTypes.length : 1,
+    },
+  );
+
+  console.log('Policy file(s) successfully generated!');
+}
diff --git a/development/generate-lavamoat-policies.sh b/development/generate-lavamoat-policies.sh
deleted file mode 100755
index d50967865..000000000
--- a/development/generate-lavamoat-policies.sh
+++ /dev/null
@@ -1,19 +0,0 @@
-#!/usr/bin/env bash
-
-set -e
-set -u
-set -o pipefail
-
-extraArgs=()
-if [[ $# -lt 1 ]]; then
-    extraArgs+=(-m 1)
-fi
-
-# Generate LavaMoat policies for the extension background script for each build
-# type.
-# ATTN: This may tax your device when running it locally.
-concurrently --kill-others-on-fail -n main,beta,flask \
-    "${extraArgs[@]}" \
-    "WRITE_AUTO_POLICY=1 yarn build scripts:prod --policy-only" \
-    "WRITE_AUTO_POLICY=1 yarn build scripts:prod --policy-only --build-type beta" \
-    "WRITE_AUTO_POLICY=1 yarn build scripts:prod --policy-only --build-type flask"
\ No newline at end of file
diff --git a/package.json b/package.json
index 23f29b1c4..e398cff45 100644
--- a/package.json
+++ b/package.json
@@ -73,9 +73,10 @@
     "lavamoat:build": "lavamoat development/build/index.js --policy lavamoat/build-system/policy.json --policyOverride lavamoat/build-system/policy-override.json",
     "lavamoat:build:auto": "yarn lavamoat:build --writeAutoPolicy",
     "lavamoat:debug:build": "yarn lavamoat:build --writeAutoPolicyDebug --policydebug lavamoat/build-system/policy-debug.json",
-    "lavamoat:background:auto": "./development/generate-lavamoat-policies.sh",
-    "lavamoat:background:auto:dev": "./development/generate-lavamoat-policies.sh --dev",
+    "lavamoat:background:auto": "node ./development/generate-lavamoat-policies.js",
+    "lavamoat:background:auto:ci": "node ./development/generate-lavamoat-policies.js --parallel=false",
     "lavamoat:auto": "yarn lavamoat:build:auto && yarn lavamoat:background:auto",
+    "lavamoat:auto:ci": "yarn lavamoat:build:auto && yarn lavamoat:background:auto:ci",
     "ts-migration:enumerate": "ts-node development/ts-migration-dashboard/scripts/write-list-of-files-to-convert.ts",
     "ts-migration:dashboard:watch": "ts-node development/ts-migration-dashboard/scripts/build.ts --watch",
     "ts-migration:dashboard:build": "ts-node development/ts-migration-dashboard/scripts/build.ts",