diff --git a/pkgs/by-name/ms/msbuild-structured-log-viewer/package.nix b/pkgs/by-name/ms/msbuild-structured-log-viewer/package.nix
index cee1eecb479f..abf900d725fc 100644
--- a/pkgs/by-name/ms/msbuild-structured-log-viewer/package.nix
+++ b/pkgs/by-name/ms/msbuild-structured-log-viewer/package.nix
@@ -23,6 +23,8 @@ buildDotnetModule (finalAttrs: {
     hash = "sha256-5i5qEwUzk9bUn2F/wcMfIOodcfn4d9ApdADes5e1nIo=";
   };
 
+  env.AVALONIA_TELEMETRY_OPTOUT = "1";
+
   dotnet-sdk = dotnetCorePackages.sdk_8_0;
   dotnet-runtime = dotnetCorePackages.runtime_8_0;