diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 7a9f76d..2483665 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -3,8 +3,7 @@ pages:
   script:
     - wget https://github.com/getzola/zola/releases/download/v0.12.2/zola-v0.12.2-x86_64-unknown-linux-gnu.tar.gz -O zola.tgz
     - tar zxvf zola.tgz
-    - git clone https://github.com/getzola/book.git themes/book/
-    - ./zola build
+    - ./build.sh
   artifacts:
     paths:
       - public
diff --git a/build.sh b/build.sh
new file mode 100755
index 0000000..4e9b3b1
--- /dev/null
+++ b/build.sh
@@ -0,0 +1,10 @@
+#!/bin/bash
+
+set -euxo pipefail
+
+git clone https://github.com/getzola/book.git themes/book/
+rm -rf public/
+zola build
+
+# Make checkboxes editable, just in case the user wants to keep their own checklist.
+find public/ -name "*.html" -type f -exec sed -i 's/input disabled=""/input/g' {} +
diff --git a/netlify.toml b/netlify.toml
index 1cc6b7a..9bd90bd 100644
--- a/netlify.toml
+++ b/netlify.toml
@@ -2,10 +2,7 @@
 
 [build]
 publish = "public"
-command = "git clone https://github.com/getzola/book.git themes/book/; zola build"
+command = "./build.sh"
 
 [build.environment]
 ZOLA_VERSION = "0.12.2"
-
-[context.deploy-preview]
-command = "zola build --base-url $DEPLOY_PRIME_URL"