diff --git a/lib/book.toml b/lib/book.toml
new file mode 100644
index 00000000..380d0d6
--- /dev/null
+++ b/lib/book.toml
@@ -0,0 +1,5 @@
+[book]
+title="@projectName@"
+
+[output.html.print]
+enable = false # don't encourage people to create more dead trees
diff --git a/lib/doc.nix b/lib/doc.nix
index 4563ade..9fe4798 100644
--- a/lib/doc.nix
+++ b/lib/doc.nix
@@ -31,7 +31,10 @@
     buildCommand = ''
       mkdir src
 
-      echo -e "[book]\ntitle=\"${projectName}\"" > src/book.toml
+      cp ${pkgs.substituteAll {
+        src = ./book.toml;
+        inherit projectName;
+      }} src/book.toml
       echo -e "# Summary\n\n- [Options](options.md)" > src/SUMMARY.md
       ln -s ${moduleDoc}/options.md ./src