diff --git a/Makefile b/Makefile
index 2da6fce..eaebcf7 100644
--- a/Makefile
+++ b/Makefile
@@ -13,6 +13,7 @@ clean:
 	rm -r _site
 
 _site: build
+	rm -rf _site
 	mkdir -p _site
 	docker run milksad-distrust-co tar c -C /usr/share/nginx/html . | tar x -C _site
 
diff --git a/_config.yml b/_config.yml
index 17c49af..60f81f1 100644
--- a/_config.yml
+++ b/_config.yml
@@ -47,3 +47,7 @@ kramdown:
 
 sass:
   sass_dir: _sass
+
+# ensure some files are not copied to the _site output folder
+exclude:
+  - "*.sh"