diff --git a/pkgs/top-level/release.nix b/pkgs/top-level/release.nix
index cffb56ab00bc..efced59ad91b 100644
--- a/pkgs/top-level/release.nix
+++ b/pkgs/top-level/release.nix
@@ -110,7 +110,10 @@ let
               jobs.tests.cc-wrapper-gcc7.x86_64-linux
               jobs.tests.cc-wrapper-gcc7.x86_64-darwin
               jobs.tests.cc-wrapper-gcc8.x86_64-linux
+
+              # broken see issue #40038
               # jobs.tests.cc-wrapper-gcc8.x86_64-darwin
+
               jobs.tests.cc-wrapper-clang.x86_64-linux
               jobs.tests.cc-wrapper-clang.x86_64-darwin
               jobs.tests.cc-wrapper-libcxx.x86_64-linux