diff --git a/lib/data/system_actions.dart b/lib/data/system_actions.dart
index 6cd8149..24598a5 100644
--- a/lib/data/system_actions.dart
+++ b/lib/data/system_actions.dart
@@ -242,7 +242,10 @@ class SystemActions {
     }
 
     final isWindows = Platform.isWindows;
-    final fromPath = _whichFai(isWindows ? 'fai.exe' : 'fai');
+    // Post-rename the entry-point binary on PATH is `chain`; still
+    // accept a legacy `fai` for installs that predate the rename.
+    final fromPath = _whichFai(isWindows ? 'chain.exe' : 'chain') ??
+        _whichFai(isWindows ? 'fai.exe' : 'fai');
     if (fromPath != null) return fromPath;
 
     final home = Platform.environment[isWindows ? 'USERPROFILE' : 'HOME'];