diff --git a/.gitignore b/.gitignore
index 24334fa..a807f4e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 src/__pycache__/
+NewLang
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..21f2ad1
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,8 @@
+build: clean_pycache
+	python3 -m zipapp src -p "/usr/bin/env python3" -c -m "main:main" -o NewLang
+
+clean_pycache:
+	test ! -d src/__pycache__ || rm -r src/__pycache__
+
+clean: clean_pycache
+	test ! -e NewLang || rm NewLang
diff --git a/src/main.py b/src/main.py
index 96ce1ac..f3eaea3 100755
--- a/src/main.py
+++ b/src/main.py
@@ -5,9 +5,11 @@
 import log
 import parse
 import interp
+import sys
 
 
-def main(args):
+def main():
+    args = sys.argv
     if len(args) != 2:
         print("Usage: main.py FILENAME")
         return 1
@@ -16,10 +18,8 @@
     if not ast:
         return 1
     interp.run_ast(ast)
-    return 0
+    sys.exit(0)
 
 
 if __name__ == "__main__":
-    import sys
-
-    sys.exit(main(sys.argv))
+    main()