diff --git a/overlay.nix b/overlay.nix
index 8ffb4bcd..0683b8b8 100644
--- a/overlay.nix
+++ b/overlay.nix
@@ -30,7 +30,8 @@ let
       amd-uprof-driver = _prev.callPackage ./pkgs/amd-uprof/driver.nix { };
     });
     lmbench = callPackage ./pkgs/lmbench/default.nix { };
-    mcxx = callPackage ./pkgs/mcxx/default.nix { };
+    # Broken and unmantained
+    # mcxx = callPackage ./pkgs/mcxx/default.nix { };
     meteocat-exporter = prev.callPackage ./pkgs/meteocat-exporter/default.nix { };
     mpi = final.mpich; # Set MPICH as default
     mpich = callPackage ./pkgs/mpich/default.nix { mpich = prev.mpich; };
diff --git a/pkgs/mcxx/default.nix b/pkgs/mcxx/default.nix
index 055bfd36..41fe2f5b 100644
--- a/pkgs/mcxx/default.nix
+++ b/pkgs/mcxx/default.nix
@@ -65,6 +65,7 @@ stdenv.mkDerivation rec {
   ];
 
   meta = {
+    broken = true;
     homepage = "https://github.com/bsc-pm/mcxx";
     description = "C/C++/Fortran source-to-source compilation infrastructure aimed at fast prototyping";
     maintainers = with lib.maintainers.bsc; [ rpenacob ];