nixos-wsl: commit tmpfiles workaround

TODO: move impl to system, this isn't even needed on WSL

hosts/nixos-wsl/configuration.nix

@@ -1,5 +1,8 @@
 { pkgs, config, lib, vars, ... }:
 {
+  imports = [
+    ./tmpfiles-workaround.nix
+  ];
   config = {
     networking.hostName = "nixos-wsl";
 

hosts/nixos-wsl/tmpfiles-workaround.nix

@@ -0,0 +1,11 @@
+{ config, lib, pkgs, ... }:
+{
+  config.systemd.tmpfiles.packages = let
+    package = pkgs.runCommand "no-systemd-tmpfiles-nocow" {} ''
+      mkdir -p "$out/lib/tmpfiles.d"
+      cd "$out/lib/tmpfiles.d"
+
+      ln -s /dev/null journal-nocow.conf
+    '';
+  in lib.mkAfter [ package ];
+}