diff --git a/modules/keyring.nix b/modules/keyring.nix
index 1fb6104..b07db7c 100644
--- a/modules/keyring.nix
+++ b/modules/keyring.nix
@@ -246,7 +246,11 @@ in {
     assertions = map (id: {
       assertion = false;
       message = "steamFrame.keyring: \"${id}\" is in both flatpaks and programs.";
-    }) (lib.intersectLists (lib.attrNames cfg.flatpaks) (lib.attrNames cfg.programs));
+    }) (lib.intersectLists (lib.attrNames cfg.flatpaks) (lib.attrNames cfg.programs))
+    ++ lib.mapAttrsToList (mime: ids: {
+      assertion = lib.length ids == 1;
+      message = "steamFrame.keyring: ${lib.removePrefix "x-scheme-handler/" mime} is in the schemeHandlers of ${lib.concatStringsSep " and " ids}.";
+    }) (lib.zipAttrs (map (h: { ${h.name} = lib.removeSuffix ".desktop" h.value; }) handlers));
 
     xdg.dataFile = lib.mapAttrs' (id: app:
       lib.nameValuePair "applications/${id}.desktop" { text = entry id app; }) apps;
diff --git a/modules/session.nix b/modules/session.nix
index 2a18b4c..f66f8bb 100644
--- a/modules/session.nix
+++ b/modules/session.nix
@@ -95,7 +95,11 @@ in {
   '' + lib.optionalString (cfg.services.start != [ ]) ''
     run /usr/bin/systemctl --user start ${units cfg.services.start}
   '' + lib.optionalString (cfg.services.stop != [ ]) ''
-    run /usr/bin/systemctl --user stop ${units cfg.services.stop} || true
+    # Skip inactive ones: stopping a unit that isn't loaded fails noisily.
+    for unit in ${units cfg.services.stop}; do
+      [[ $(/usr/bin/systemctl --user show -p ActiveState --value "$unit") == inactive ]] \
+        || run /usr/bin/systemctl --user stop "$unit" || true
+    done
   '' + lib.optionalString (cfg.services.restart != [ ]) ''
     run /usr/bin/systemctl --user restart ${units cfg.services.restart}
   '');
diff --git a/scripts/vr-keyboard-replay.mjs b/scripts/vr-keyboard-replay.mjs
index 3cd93bf..4a9130e 100644
--- a/scripts/vr-keyboard-replay.mjs
+++ b/scripts/vr-keyboard-replay.mjs
@@ -6,10 +6,10 @@ import { readFileSync } from 'node:fs';
 const [, , decoderPath, dictPath, pathsPath, expected] = process.argv;
 const D = (0, eval)(readFileSync(decoderPath, 'utf8'));
 const dict = D.parseDict(JSON.parse(readFileSync(dictPath, 'utf8')));
-for (const p of JSON.parse(readFileSync(pathsPath, 'utf8'))) {
+for (const [i, p] of JSON.parse(readFileSync(pathsPath, 'utf8')).entries()) {
   const lay = D.layout(dict, p.keys, p.unit);
   const res = D.decode(lay, p.pts, { unit: p.unit, max: 8 });
-  console.log(`${p.t}: recorded ${p.top.join(' ')}\n  now ${res.map((r) => `${r.word} ${r.cost.toFixed(2)}`).join(', ')}`);
+  console.log(`#${i}: recorded ${p.top.join(' ')}\n  now ${res.map((r) => `${r.word} ${r.cost.toFixed(2)}`).join(', ')}`);
   if (expected) {
     const f = D.decode(lay, p.pts, { unit: p.unit, features: true }).find((x) => x.word === expected);
     console.log(`  ${expected}: ${f ? JSON.stringify(f.f) : 'pruned (start/end key or a letter too far from the path)'}`);
diff --git a/scripts/webpack-modules.mjs b/scripts/webpack-modules.mjs
index 4b937ce..752c351 100644
--- a/scripts/webpack-modules.mjs
+++ b/scripts/webpack-modules.mjs
@@ -149,7 +149,7 @@ export function loadBundles(dir, { files, exclude } = {}) {
   for (const f of files) {
     if (exclude?.test(f)) continue;
     const p = join(dir, f);
-    if (!statSync(p).isFile()) continue;
+    if (!statSync(p, { throwIfNoEntry: false })?.isFile()) continue;   // listed by the page but missing
     const src = readFileSync(p, 'utf8');
     if (!/webpackChunk|[\w$]=\{\d+:/.test(src)) continue;
     for (const m of extractModules(src)) {