diff --git a/.github/workflows/release-pdf.yml b/.github/workflows/release-pdf.yml
index 6ff0bd4..60c828d 100644
--- a/.github/workflows/release-pdf.yml
+++ b/.github/workflows/release-pdf.yml
@@ -19,9 +19,11 @@ jobs:
             access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
       - name: Show nixpkgs version
         run: nix-instantiate --eval -E '(import <nixpkgs> {}).lib.version'
-      - name: Run a command with nix develop
+      - name: Generate PDF
         run: |
           nix develop .#export-pdf --ignore-environment --command bash -c '
+            set -e
+            export NO_SANDBOX=true
             pnpm install
             pnpm export-pdf
           '
diff --git a/docs/.vitepress/vitepress-pdf.config.ts b/docs/.vitepress/vitepress-pdf.config.ts
index a5f1623..4097a30 100644
--- a/docs/.vitepress/vitepress-pdf.config.ts
+++ b/docs/.vitepress/vitepress-pdf.config.ts
@@ -28,8 +28,8 @@ const footerTemplate = `<div style="margin-bottom: -0.4cm; height: 70%; width: 1
 export default defineUserConfig({
   urlOrigin: "https://nixos-and-flakes.thiscute.world/",
 
-  // When process.env.CI is true (in GitHub Actions), disable sandboxing
-  ...(process.env.CI
+  // When NO_SANDBOX is true, disable sandboxing
+  ...(process.env.NO_SANDBOX === "true"
     ? {
         puppeteerLaunchOptions: {
           args: ["--no-sandbox", "--disable-setuid-sandbox"],