From 4e154ad7b624dfdcb0fc8e366af14ec8cecb6452 Mon Sep 17 00:00:00 2001
From: Benedikt Peetz <benedikt.peetz@b-peetz.de>
Date: Mon, 2 Nov 2026 19:22:08 +0100
Subject: by-name.nix: Also filter empty results for the `fileRegex` codepath

---
 by-name.nix | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/by-name.nix b/by-name.nix
index db6c6bb..5e3242e 100644
--- a/by-name.nix
+++ b/by-name.nix
@@ -136,12 +136,14 @@ assert fileRegex == null -> fileName != null; let
       ;
   };
 
-  secondPass =
+  secondPass = let
+    base = filterAttrs (_: value: value != []) firstPass;
+  in
     if fileName != null
     then
       builtins.mapAttrs (name: value: builtins.head value)
-      (filterAttrs (_: value: value != []) firstPass)
-    else firstPass;
+      base
+    else base;
 in
   builtins.mapAttrs
   finalizeFunction
-- 
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