Nix setup

.envrc

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+use nix

shell.nix

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+let
+
+myHaskellPackageOverlay = self: super: {
+  myHaskellPackages = super.haskellPackages.override {
+    overrides = hself: hsuper: rec {
+    };
+  };
+};
+
+in
+
+{ nixpkgs ? import (fetchTarball "https://github.com/NixOS/nixpkgs/archive/refs/tags/23.11.tar.gz")
+  {
+    config.allowBroken = false;
+    overlays = [ myHaskellPackageOverlay ];
+  }
+}:
+
+let
+
+  pkgs = nixpkgs;
+
+  haskellDeps = ps: with ps; [
+    base mwc-random random
+  ];
+
+in
+
+pkgs.stdenv.mkDerivation {
+  name = "Whatever";
+
+  buildInputs = [
+    (pkgs.myHaskellPackages.ghcWithPackages haskellDeps)
+    pkgs.cabal-install
+  ];
+}