diff --git a/pkgs/development/compilers/mono/5.0.nix b/pkgs/development/compilers/mono/5.0.nix
index 911ba0ae02a..d10d6e3e605 100644
--- a/pkgs/development/compilers/mono/5.0.nix
+++ b/pkgs/development/compilers/mono/5.0.nix
@@ -4,4 +4,5 @@ callPackage ./generic-cmake.nix (rec {
   inherit Foundation libobjc;
   version = "5.0.1.1";
   sha256 = "064pgsmanpybpbhpam9jv9n8aicx6mlyb7a91yzh3kcksmqsxmj8";
+  enableParallelBuilding = false; # #32386, https://hydra.nixos.org/build/65820147
 })