apps/run-workflow-with-vm: remove wrapper and update README

apps/run-workflow-with-vm/README.adoc

@@ -37,3 +37,12 @@ Once you have an folder containing those extra snippets, you can simply include
 ----
 run-workflow-with-vm a-happy-gnome -I extra-config=./extra-config-stuff
 ----
+
+Another thing, this script is using https://github.com/nix-community/nixos-generators[nixos-generators] to build the VM which in turn basically uses nixpkgs' integration of it (at `${pkgs.path}/nixos/modules/virtualisation/build-vm.nix`).
+You can extend it either by adding NixOS modules configuring the virtual machine or by adding certain arguments to the script.
+This won't be an exhaustive list of niceties as it involves a script that may change but here's some things you can do.
+
+* You can pass the `SHARED_DIR` environment variable to add a directory to be shared from the host and the guest.
+This is useful for testing out spontaneous changes as if you're booting into the system itself.
+
+* You can pass additional arguments as if you're using `qemu-*` utilities which would be useful for changing graphical drivers and all that jazz.

apps/run-workflow-with-vm/default.nix

@@ -2,8 +2,6 @@
 , lib
 , meson
 , ninja
-, nix
-, makeWrapper
 , inputs ? [ ]
 }:
 
@@ -16,18 +14,12 @@ stdenv.mkDerivation (finalAttrs: {
   nativeBuildInputs = [
     meson
     ninja
-    makeWrapper
   ];
 
   preConfigure = ''
     mesonFlagsArray+=("-Dinputs=[${lib.concatStringsSep "," inputs}]")
   '';
 
-  postInstall = ''
-    wrapProgram $out/bin/${finalAttrs.pname} \
-      --prefix PATH ':' '${lib.makeBinPath [ nix ]}'
-  '';
-
   meta = with lib; {
     description = "Quickly run workflow modules with a VM.";
     license = licenses.gpl3Plus;