diff --git a/build.sh b/build.sh
new file mode 100755
index 0000000..5619b7b
--- /dev/null
+++ b/build.sh
@@ -0,0 +1,6 @@
+#!/bin/sh
+if [ ! -e build ]; then
+	mkdir build
+fi
+as -g -o build/postfix.o postfix.s
+ld -o build/postfix build/postfix.o