diff --git a/pkgs/applications/networking/browsers/chromium/browser.nix b/pkgs/applications/networking/browsers/chromium/browser.nix
index c4a5508b753..989368f198c 100644
--- a/pkgs/applications/networking/browsers/chromium/browser.nix
+++ b/pkgs/applications/networking/browsers/chromium/browser.nix
@@ -89,5 +89,6 @@ mkChromiumDerivation (base: rec {
       then ["aarch64-linux" "x86_64-linux"]
       else [];
     timeout = 172800; # 48 hours (increased from the Hydra default of 10h)
+    broken = elem channel [ "beta" "dev" ]; # Build requires LLVM 12
   };
 })