diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 93bd824f09fb..f2287702920b 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -27043,7 +27043,9 @@ with pkgs;
   OVMF = callPackage ../applications/virtualization/OVMF { };
   OVMFFull = callPackage ../applications/virtualization/OVMF {
     secureBoot = true;
-    csmSupport = true;
+    # CSM support is a BIOS emulation mechanism,
+    # SeaBIOS is only available on x86.
+    csmSupport = stdenv.hostPlatform.isx86;
     httpSupport = true;
     tpmSupport = true;
   };