diff --git a/doc/manual/meson.build b/doc/manual/meson.build
index e4ff0684b..f7763d19a 100644
--- a/doc/manual/meson.build
+++ b/doc/manual/meson.build
@@ -1,6 +1,7 @@
 nix_env_for_docs = {
   'HOME': '/dummy',
   'NIX_CONF_DIR': '/dummy',
+  'XDG_CONFIG_HOME': '/dummy',
   'NIX_SSL_CERT_FILE': '/dummy/no-ca-bundle.crt',
   'NIX_STATE_DIR': '/dummy',
   'NIX_CONFIG': 'cores = 0',