diff --git a/pkgs/tools/misc/hdf5/default.nix b/pkgs/tools/misc/hdf5/default.nix
index 2b336f722305..f4233cfbe321 100644
--- a/pkgs/tools/misc/hdf5/default.nix
+++ b/pkgs/tools/misc/hdf5/default.nix
@@ -24,10 +24,6 @@
   python3,
 }:
 
-# cpp and mpi options are mutually exclusive
-# "-DALLOW_UNSUPPORTED=ON" could be used to force the build.
-assert !cppSupport || !mpiSupport;
-
 let
   inherit (lib) optional optionals;
 in