diff --git a/artiq-fast/wfvm/qemu.nix b/artiq-fast/wfvm/qemu.nix
deleted file mode 100644
index f02e6d3..0000000
--- a/artiq-fast/wfvm/qemu.nix
+++ /dev/null
@@ -1,41 +0,0 @@
-{ pkgs, qemuMem }:
-
-with pkgs;
-
-let
-  qemu-img = "${qemu_kvm}/bin/qemu-img";
-  runQemu = isolateNetwork: forwardedPorts: extraArgs:
-    let
-      restrict =
-        if isolateNetwork
-        then "on"
-        else "off";
-      # use socat instead of `tcp:…` to allow multiple connections
-      guestfwds =
-        builtins.concatStringsSep ""
-          (
-            map (
-              { listenAddr, targetAddr, port }:
-                ",guestfwd=tcp:${listenAddr}:${toString port}-cmd:${socat}/bin/socat\\ -\\ tcp:${targetAddr}:${toString port}"
-            ) forwardedPorts
-          );
-      args = [
-        "-enable-kvm"
-        "-m"
-        qemuMem
-        "-bios"
-        "${OVMF.fd}/FV/OVMF.fd"
-        "-netdev"
-        "user,id=n1,net=192.168.1.0/24,restrict=${restrict},hostfwd=tcp::2022-:22${guestfwds}"
-        "-device"
-        "e1000,netdev=n1"
-      ];
-      argStr = builtins.concatStringsSep " " (args ++ extraArgs);
-    in
-      "${qemu_kvm}/bin/qemu-system-x86_64 ${argStr}";
-
-in
-{
-  inherit qemu-img runQemu;
-  inputs = [ qemu_kvm ];
-}