feat: adds back overlays and adds nix-search-fzf stolen from this file: https://github.com/IvarWithoutBones/dotfiles/blob/main/home-manager/modules/zsh.nix#L65

pkgs/nix-search-fzf/fzf-preview.sh

@@ -0,0 +1,73 @@
+#! /usr/bin/env nix-shell
+#! nix-shell -i bash -p
+# shellcheck shell=bash
+
+set -euo pipefail
+
+PKG_NAME="$1"
+FLAKE="$2"
+FLAKE_PATH="${FLAKE}#${PKG_NAME}"
+
+removeQuotes() {
+  local flag="$*"
+  flag="${flag%\"}"
+  echo "${flag#\"}"
+}
+
+newlinesToCommaSeperated() {
+  echo "$@" | sed ':a;N;$!ba;s/\n/, /g'
+}
+
+evalAttr() {
+  local attr data
+  attr="$1"
+  data="$(nix eval "$FLAKE_PATH"."$attr" 2>/dev/null)"
+  [[ $data != "null" && $data != "false" && -n $data ]] && removeQuotes "$data"
+}
+
+evalJsonAttr() {
+  local attr jqArgs data
+  attr="$1"
+  jqArgs="$2"
+  data="$(nix eval --json "$FLAKE_PATH"."$attr" 2>/dev/null | jq -r "$jqArgs")"
+  [[ $data != "null" && -n $data ]] && echo "$data"
+}
+
+evalNixpkgsLib() {
+  local function data
+  function="$1"
+  # Impure is needed to import the flake reference
+  data="$(nix eval --raw --impure --expr "let pkgs = (builtins.getFlake \"flake:$FLAKE\"); in pkgs.lib.$function pkgs.$PKG_NAME" 2>/dev/null)"
+  [[ $data != "null" && -n $data ]] && echo "$data"
+}
+
+maybeEcho() {
+  local -r prefix="$1"
+  local flag="$2"
+  local -r commaSeperated="${3:-false}"
+  [[ $commaSeperated == "true" ]] && flag="$(newlinesToCommaSeperated "$flag")"
+  test -n "$flag" && echo "$prefix $flag"
+}
+
+test -n "$(evalAttr "meta.broken")" && echo "broken: true"
+test -n "$(evalAttr "meta.insecure")" && echo "insecure: true"
+
+version="$(evalAttr "version")"
+# Derive the version from "name" using 'lib.getVersion' if it's not set
+test -z "$version" && version="$(evalNixpkgsLib "getVersion")"
+maybeEcho "version:" "$version"
+
+homepage="$(evalAttr "meta.homepage")"
+maybeEcho "homepage:" "$homepage"
+
+description="$(evalAttr "meta.description")"
+maybeEcho "description:" "$description"
+
+license="$(evalJsonAttr "meta.license" 'if type=="array" then .[].fullName else .fullName end')"
+maybeEcho "license:" "$license" true
+
+maintainers="$(evalJsonAttr "meta.maintainers" '.[].github')"
+maybeEcho "maintainers:" "$maintainers" true
+
+platforms="$(evalJsonAttr "meta.platforms" 'if type=="array" then .[] else . end')"
+maybeEcho "platforms:" "$platforms" true