diff --git a/pkgs/by-name/kn/knossosnet/package.nix b/pkgs/by-name/kn/knossosnet/package.nix
index b392df89e27b..55751fa082af 100644
--- a/pkgs/by-name/kn/knossosnet/package.nix
+++ b/pkgs/by-name/kn/knossosnet/package.nix
@@ -25,6 +25,9 @@ buildDotnetModule rec {
   nugetDeps = ./deps.json;
   executables = [ "Knossos.NET" ];
 
+  # IO errors in build due to solution building race
+  enableParallelBuilding = false;
+
   runtimeDeps = [ openal ];
 
   nativeBuildInputs = [ copyDesktopItems ];