diff --git a/docs/gotchas.md b/docs/gotchas.md
index b5bf6782..a3b131c8 100644
--- a/docs/gotchas.md
+++ b/docs/gotchas.md
@@ -12,8 +12,8 @@ touching.
 The CLI doesn't accept `--bind`. Path is via `EXTRA_NSPAWN_FLAGS` in
 `/etc/nixos-containers/<NAME>.conf` — the start script
 (`/nix/store/.../container_-start`) expands it unquoted into the
-`systemd-nspawn` invocation. `lifecycle::set_nspawn_flags()` rewrites
-this line.
+`systemd-nspawn` invocation. `lifecycle::host_config::set_nspawn_flags()`
+rewrites this line.
 
 ### `/run/systemd/nspawn/*.nspawn` overrides are ignored
 
@@ -187,21 +187,22 @@ scripts, manual `rm -rf`), the dashboard's next render marks them
 
 ### SPA fallback: use `Accept` header map, not `try_files ... /index.html`
 
-The naive nginx pattern for a path-prefix SPA (`try_files $uri $uri/
-/matrix/index.html`) silently swallows asset 404s — a missing JS file
+The naive nginx pattern for an SPA (`try_files $uri $uri/
+/index.html`) silently swallows asset 404s — a missing JS file
 returns `index.html` with a 200, so the JS runtime never loads and the
 page renders blank with no visible error. Extension allowlists (tried
 as an alternative) have the same maintenance problem: any new file
 extension the SPA ships breaks silently.
 
-The pattern that works (`hive-gateway.nix`) keys the fallback on the
+The pattern that works (`nix/host-modules/hive-matrix.nix`, serving
+fluffychat at the matrix gateway vhost's root) keys the fallback on the
 HTTP `Accept` header:
 
 ```nginx
 # Outside the server block (appendHttpConfig):
 map $http_accept $matrix_spa_target {
   default          "/__matrix_spa_no_html_fallback";
-  "~*text/html"    "/matrix/index.html";
+  "~*text/html"    "/index.html";
 }
 
 # Inside the location: