rsync: fix test failure on darwin

Not-cherry-picked-because: Guarded to darwin, will remove guard on staging/staging-26.05
(cherry picked from commit c10ba493e0f242454a78fdde32fce0956065222c)

pkgs/by-name/rs/rsync/package.nix

@@ -2,6 +2,7 @@
   lib,
   stdenv,
   fetchurl,
+  fetchpatch,
 
   updateAutotoolsGnuConfigScriptsHook,
   perl,
@@ -36,6 +37,17 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-vYjPgvplPaMjFPsikTZAfFyQ+A0XWNj0sJF2eHfY+pY=";
   };
 
+  patches = lib.optionals (stdenv.hostPlatform.isDarwin) [
+    # Fixes test failure on darwin
+    (fetchpatch {
+      url = "https://github.com/RsyncProject/rsync/commit/e1c5f0e93a75dd45f32f3b92ba221ef158ac2e5f.patch";
+      hash = "sha256-pg65K9BCTq/WvS5icK6KT28ARccFKedp2445wLYdRsE=";
+      excludes = [
+        ".github/workflows/cygwin-build.yml"
+      ];
+    })
+  ];
+
   preBuild = ''
     patchShebangs ./runtests.py
   '';