Feat/integrated shrinking

.envrc

@@ -0,0 +1,3 @@
+use_nix
+
+eval $(opam env --set-switch)

shell.nix

@@ -0,0 +1,9 @@
+{ pkgs ? import <nixpkgs> {} }:
+pkgs.mkShell {
+  # buildInputs is for dependencies you'd need "at run time",
+  # were you to to use nix-build not nix-shell and build whatever you were working on
+  buildInputs = with pkgs; [
+    opam
+    git
+  ];
+}