these 8 derivations will be built:
  /nix/store/0m98wqzw7icwnafj6wqbv8xjnd7i2ysm-hm-firefox-extensions.drv
  /nix/store/qlcij8lgf31yajm9lrxggsa5dg376gj1-tree_style_tab-4.4.0.xpi.drv
  /nix/store/7sxjwl1dc5warmw9mnd84zj0yg7qxw2m-tree-style-tab-4.4.0.drv
  /nix/store/g7di8l8q4piffnsxp730w2x83k0y2qq0-old_reddit_redirect-3.0.0.xpi.drv
  /nix/store/xgibqar5qdqr4cmgwxshgxzxyyg7s6ml-old-reddit-redirect-3.0.0.drv
  /nix/store/zqdrqgz7nhwaijy5c5qdgbq6jz8ywwxf-hm-firefox-extensions.drv
  /nix/store/g9yqx7v3l01qfbzn1cqd52d21dw88602-home-manager-files.drv
  /nix/store/94wgp7vbc1aymz205wkvr7dx2kgzrif7-home-manager-generation.drv