From 8eefc2b1cc312d5572f98ae7f99a497f3ccb1a29 Mon Sep 17 00:00:00 2001
From: David McFarland <corngood@gmail.com>
Date: Sun, 11 Jan 2026 14:54:45 -0400
Subject: [PATCH] avalonia: fix build failure

Fixes: 28520d4f4c54e1dd37edca2ad60accb158f3cbaa
---
 .../av/avalonia/0003-disable-hard-links.patch      | 14 ++++++++++++++
 pkgs/by-name/av/avalonia/package.nix               |  3 +++
 2 files changed, 17 insertions(+)
 create mode 100644 pkgs/by-name/av/avalonia/0003-disable-hard-links.patch

diff --git a/pkgs/by-name/av/avalonia/0003-disable-hard-links.patch b/pkgs/by-name/av/avalonia/0003-disable-hard-links.patch
new file mode 100644
index 000000000000..0e4a788186fb
--- /dev/null
+++ b/pkgs/by-name/av/avalonia/0003-disable-hard-links.patch
@@ -0,0 +1,14 @@
+diff --git a/Directory.Build.props b/Directory.Build.props
+index f124456..117c096 100644
+--- a/Directory.Build.props
++++ b/Directory.Build.props
+@@ -9,9 +9,5 @@
+       <AddSyntheticProjectReferencesForSolutionDependencies>false</AddSyntheticProjectReferencesForSolutionDependencies>
+       <RunApiCompat>False</RunApiCompat>
+       <LangVersion>12</LangVersion>
+-      <CreateHardLinksForCopyAdditionalFilesIfPossible>true</CreateHardLinksForCopyAdditionalFilesIfPossible>
+-      <CreateHardLinksForCopyFilesToOutputDirectoryIfPossible>true</CreateHardLinksForCopyFilesToOutputDirectoryIfPossible>
+-      <CreateHardLinksForCopyLocalIfPossible>true</CreateHardLinksForCopyLocalIfPossible>
+-      <CreateHardLinksForPublishFilesIfPossible>true</CreateHardLinksForPublishFilesIfPossible>
+   </PropertyGroup>
+ </Project>
diff --git a/pkgs/by-name/av/avalonia/package.nix b/pkgs/by-name/av/avalonia/package.nix
index 4b39631b3371..538b29b58c21 100644
--- a/pkgs/by-name/av/avalonia/package.nix
+++ b/pkgs/by-name/av/avalonia/package.nix
@@ -62,6 +62,9 @@ stdenvNoCC.mkDerivation (
         # [ERR] Compile: [...]/Microsoft.NET.Sdk.targets(148,5): error MSB4018: The "GenerateDepsFile" task failed unexpectedly. [/build/source/src/tools/DevAnalyzers/DevAnalyzers.csproj]
         # [ERR] Compile: [...]/Microsoft.NET.Sdk.targets(148,5): error MSB4018: System.IO.IOException: The process cannot access the file '/build/source/src/tools/DevAnalyzers/bin/Release/netstandard2.0/DevAnalyzers.deps.json' because it is being used by another process. [/build/source/src/tools/DevAnalyzers/DevAnalyzers.csproj]
         ./0002-disable-parallel-compile.patch
+        # Microsoft.Common.CurrentVersion.targets(5034,5): error MSB3021: Unable to copy file "[...]/JetBrains.Annotations.dll" to "bin/Debug/JetBrains.Annotations.dll". Access to the path '/build/source/nukebuild/bin/Debug/JetBrains.Annotations.dll' is denied. [/build/source/nukebuild/_build.csproj]
+        # This happens because the source packages have symlinks due to linkNuGetPackagesAndSources.
+        ./0003-disable-hard-links.patch
       ];
 
       # this needs to be match the version being patched above