diff --git a/.gitattributes b/.gitattributes
index 44b7f8c..6634a8f 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -10,7 +10,6 @@
 /.github/workflows/upgrade-main.yml linguist-generated
 /.gitignore linguist-generated
 /.mergify.yml linguist-generated
-/.npmignore linguist-generated
 /.prettierrc.json linguist-generated
 /.projen/** linguist-generated
 /.projen/deps.json linguist-generated
diff --git a/.gitignore b/.gitignore
index 184ab42..3ba0dae 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,7 +7,6 @@
 !/.github/workflows/pull-request-lint.yml
 !/package.json
 !/LICENSE
-!/.npmignore
 logs
 *.log
 npm-debug.log*
diff --git a/.npmignore b/.npmignore
deleted file mode 100644
index 1ce8286..0000000
--- a/.npmignore
+++ /dev/null
@@ -1,23 +0,0 @@
-# ~~ Generated by projen. To modify, edit .projenrc.js and run "npx projen".
-/.projen/
-/test-reports/
-junit.xml
-/coverage/
-permissions-backup.acl
-/dist/changelog.md
-/dist/version.txt
-/.mergify.yml
-/test/
-/tsconfig.dev.json
-/src/
-!/build/
-!/build/**/*.js
-!/build/**/*.d.ts
-dist
-/tsconfig.json
-/.github/
-/.vscode/
-/.idea/
-/.projenrc.js
-tsconfig.tsbuildinfo
-/.eslintrc.json
diff --git a/.projen/files.json b/.projen/files.json
index 8614680..55c00eb 100644
--- a/.projen/files.json
+++ b/.projen/files.json
@@ -9,7 +9,6 @@
     ".github/workflows/upgrade-main.yml",
     ".gitignore",
     ".mergify.yml",
-    ".npmignore",
     ".prettierrc.json",
     ".projen/deps.json",
     ".projen/files.json",
diff --git a/.projenrc.cjs b/.projenrc.cjs
index 40f4158..62c2cb5 100644
--- a/.projenrc.cjs
+++ b/.projenrc.cjs
@@ -115,6 +115,7 @@ const project = new GitHubActionTypeScriptProject({
   codeCov: false,
   libdir: 'build',
   entrypoint: 'build/index.js',
+  npmignoreEnabled: false,
   tsconfig: {
     compilerOptions: {
       declaration: true,
@@ -218,6 +219,8 @@ if (packageJson) {
   packageJson.addOverride('jest.globals', undefined);
   // The entrypoint property is supposed to manage this but it doesn't work
   packageJson.addOverride('main', 'build/index.js');
+  // We don't want to publish this to NPM.
+  packageJson.addOverride('private', true);
 }
 
 project.synth();
diff --git a/package.json b/package.json
index ad52e69..8a0aeb2 100644
--- a/package.json
+++ b/package.json
@@ -122,5 +122,6 @@
     "@types/responselike": "1.0.0",
     "got": "12.3.1"
   },
+  "private": true,
   "//": "~~ Generated by projen. To modify, edit .projenrc.js and run \"npx projen\"."
 }