interop: enable preserveArgvZero

Fixes interop with latest WSL versions

Author: K900

modules/wsl-distro.nix

@@ -67,8 +67,22 @@ with builtins; with lib;
         binfmt.registrations = mkIf cfg.interop.register {
           WSLInterop = {
             magicOrExtension = "MZ";
-            interpreter = "/init";
+
+            # FIXME: temporary hack for https://github.com/nix-community/NixOS-WSL/pull/84
+            interpreter = pkgs.writeShellScript "nixos-wsl-binfmt-hack" ''
+              /init /nixos-wsl-does-not-exist.exe
+              if [ $? -eq 1 ]; then
+                # new style /init wants preserve-argv0
+                exec /init $@
+              else
+                # old style /init does not
+                shift
+                exec /init $@
+              fi
+            '';
+
             fixBinary = true;
+            preserveArgvZero = true;
           };
         };
       };