From 3a5c240ffece70c76c3ee8a3fc8a724569b845a8 Mon Sep 17 00:00:00 2001
From: Michael Daniels <mdaniels5757@gmail.com>
Date: Sun, 14 Jun 2026 12:05:43 -0400
Subject: [PATCH] tests.replaceVars: fix group mismatches
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This fixes group mismatches observed on Darwin, e.g.:

```
replaceVars-succeeds
--- /nix/store/wahj58fiii5j1jy6s9mpbdyxzhq3plnb-source.txt
+++ /nix/store/bfmykrc9r5ycy0dj8l1z2p9c5116dny8-expected
├── stat {}
│ @@ -1,7 +1,7 @@
│
│    Size: 96        	Blocks: 0          IO Block: 4096   directory
│ -Device: 1,15	Access: (0555/dr-xr-xr-x)  Uid: (    0/    root)   Gid: (    0/   wheel)
│ +Device: 1,15	Access: (0555/dr-xr-xr-x)  Uid: (    0/    root)   Gid: (  350/  nixbld)
│
│  Modify: 1970-01-01 00:00:01.000000000 +0000
```
---
 pkgs/test/replace-vars/default.nix | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/pkgs/test/replace-vars/default.nix b/pkgs/test/replace-vars/default.nix
index e1cc2bf1c13d..a6dd3c15ec32 100644
--- a/pkgs/test/replace-vars/default.nix
+++ b/pkgs/test/replace-vars/default.nix
@@ -6,6 +6,7 @@
   lib,
   runCommand,
   testers,
+  writeText,
 }:
 let
   inherit (testers) testEqualContents testBuildFailure;
@@ -22,7 +23,7 @@ let
         };
 
         expected = mkExpectation (
-          builtins.toFile "source.txt" ''
+          writeText "source.txt" ''
             All human beings are born free and are the same in dignity and rights.
             They are endowed with reason and conscience and should act towards
             one another in a spirit of shared humanity.
@@ -53,7 +54,7 @@ let
           {
             failed =
               let
-                src = builtins.toFile "source.txt" ''
+                src = writeText "source.txt" ''
                   Header.
                   before @whatIsThis@ middle @It'sOdd2Me@ after.
                   @cannot detect due to space@
@@ -86,7 +87,7 @@ let
         };
 
         expected = mkExpectation (
-          builtins.toFile "source.txt" ''
+          writeText "source.txt" ''
             All human beings are born free and are the same in dignity and rights.
             They are endowed with reason and conscience and should act towards
             one another in a spirit of @brotherhood@.
@@ -101,7 +102,7 @@ let
           {
             failed =
               let
-                src = builtins.toFile "source.txt" ''
+                src = writeText "source.txt" ''
                   @a@
                   @b@
                   @c@
@@ -127,7 +128,7 @@ let
           {
             failed =
               let
-                src = builtins.toFile "source.txt" ''
+                src = writeText "source.txt" ''
                   @a@
                   @b@
                 '';