diff --git a/.npmignore b/.npmignore
index a5c57244..507e2b0e 100644
--- a/.npmignore
+++ b/.npmignore
@@ -1,2 +1,10 @@
-src/
-gulpfile.js
+# ignore everything
+*
+
+# include these:
+!/lib/**/*
+!LICENSE.md
+!README.md
+
+# exclude hidden files from the includes:
+.*
diff --git a/package.json b/package.json
index 4b1d90d7..96603163 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,8 @@
   "main": "lib/index.js",
   "types": "lib/index.d.ts",
   "scripts": {
-    "build": "tsc && chmod +x lib/cli.js",
+    "clean": "rm -rf lib/",
+    "build": "yarn clean && tsc && chmod +x lib/cli.js",
     "test": "jest",
     "test:watch": "jest --watch",
     "test:ci": "jest --coverage",