diff --git a/build.sh b/build.sh
index e69a6d3..a0028c2 100755
--- a/build.sh
+++ b/build.sh
@@ -1,5 +1,6 @@
 #!/bin/sh
 
+mkdir -p build/$1
 rm -r build/$1/*
 cp -R src/{*.js,*.html,*.css,fonts,images} build/$1/
 cp -R src/platform/$1/* build/$1/