diff --git a/pkgs/servers/web-apps/outline/default.nix b/pkgs/servers/web-apps/outline/default.nix
index 5e047f326dd0..632db5ff49c8 100644
--- a/pkgs/servers/web-apps/outline/default.nix
+++ b/pkgs/servers/web-apps/outline/default.nix
@@ -56,7 +56,12 @@ stdenv.mkDerivation rec {
     runHook preInstall
 
     mkdir -p $out/bin $out/share/outline
-    mv public node_modules build $out/share/outline/
+    mv node_modules build $out/share/outline/
+    # On NixOS the WorkingDirectory is set to the build directory, as
+    # this contains files needed in the onboarding process. This folder
+    # must also contain the `public` folder for mail notifications to
+    # work, as it contains the mail templates.
+    mv public $out/share/outline/build
 
     node_modules=$out/share/outline/node_modules
     build=$out/share/outline/build