diff --git a/pkgs/development/libraries/google-cloud-cpp/default.nix b/pkgs/development/libraries/google-cloud-cpp/default.nix
index 7eb69d075cab..b2d8856bfea1 100644
--- a/pkgs/development/libraries/google-cloud-cpp/default.nix
+++ b/pkgs/development/libraries/google-cloud-cpp/default.nix
@@ -58,5 +58,6 @@ in stdenv.mkDerivation rec {
     homepage = "https://github.com/googleapis/google-cloud-cpp";
     description = "C++ Idiomatic Clients for Google Cloud Platform services";
     maintainers = with maintainers; [ andir flokli ];
+    broken = true; # Broken on Hydra since 2020-05-19
   };
 }
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 3f431626c380..5ac3f6e433eb 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -9624,7 +9624,7 @@ in
     stdenv = gcc7Stdenv;
   });
 
-  llvmPackages_latest = llvmPackages_10;
+  llvmPackages_latest = llvmPackages_11;
 
   llvmPackages_rocm = callPackage ../development/compilers/llvm/rocm { };