diff --git a/nixos/lib/qemu-flags.nix b/nixos/lib/qemu-flags.nix
index e4c95ebdfb0..6f61c64a832 100644
--- a/nixos/lib/qemu-flags.nix
+++ b/nixos/lib/qemu-flags.nix
@@ -13,9 +13,9 @@
         else throw "Unknown QEMU serial device for system '${pkgs.stdenv.system}'";
 
   qemuBinary = qemuPkg: {
-    "i686-linux" = "${qemuPkg}/bin/qemu-kvm";
     "x86_64-linux" = "${qemuPkg}/bin/qemu-kvm -cpu kvm64";
     "armv7l-linux" = "${qemuPkg}/bin/qemu-system-arm -enable-kvm -machine virt -cpu host";
     "aarch64-linux" = "${qemuPkg}/bin/qemu-system-aarch64 -enable-kvm -machine virt,gic-version=host -cpu host";
-  }.${pkgs.stdenv.system} or (throw "Unknown QEMU binary for '${pkgs.stdenv.system}'");
+    "x86_64-darwin" = "${qemuPkg}/bin/qemu-kvm -cpu kvm64";
+  }.${pkgs.stdenv.system} or "${qemuPkg}/bin/qemu-kvm";
 }