diff --git a/README.md b/README.md
index 13a9fe2..3130360 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@ This is the [Nix] and [Home Manager] configuration for managing my MacBook.
 
 ## Usage
 
-First install [Nix]. Then, in the repo directory, run `nix develop` to get into the Nix shell.
+First install [Nix] and [Homebrew]. Then, in the repo directory, run `nix develop` to get into the Nix shell.
 
 To set up the MacBook as per the config, run:
 
@@ -31,5 +31,6 @@ just <repo_dir>/switch # or update or clean
 ```
 
 [Nix]: https://nixos.org
+[Homebrew]: https://brew.sh
 [Home Manager]: https://github.com/nix-community/home-manager
 [`just`]: https://just.systems
diff --git a/flake.nix b/flake.nix
index 9b55c3e..f90684a 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,5 +1,5 @@
 {
-  description = "Home Manager configuration of Abhinav Sarkar";
+  description = "Nix Darwin + Home Manager configuration of Abhinav Sarkar";
 
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs?rev=5f5210aa20e343b7e35f40c033000db0ef80d7b9";
@@ -47,6 +47,7 @@
         specialArgs = { inherit inputs; };
         modules = [
           ./configuration.nix
+          ./homebrew.nix
           home-manager.darwinModules.home-manager
           {
             home-manager.useGlobalPkgs = true;
diff --git a/homebrew.nix b/homebrew.nix
new file mode 100644
index 0000000..ca7e298
--- /dev/null
+++ b/homebrew.nix
@@ -0,0 +1,47 @@
+{ ... }: {
+  homebrew = {
+    enable = true;
+    onActivation = {
+      autoUpdate = false;
+      cleanup = "uninstall";
+      upgrade = false;
+    };
+    global = {
+      autoUpdate = false;
+      brewfile = true;
+    };
+    casks = [
+      "amethyst"
+      "appcleaner"
+      "calibre"
+      "dropbox"
+      "fanny"
+      "firefox"
+      "garmin-express"
+      "google-chrome"
+      "homebrew/cask/handbrake"
+      "monodraw"
+      "obsidian"
+      "spotify"
+      "steam"
+      "telegram"
+      "utm"
+      "vlc"
+    ];
+    masApps = {
+      Amphetamine = 937984704;
+      Bear = 1091189122;
+      GarageBand = 682658836;
+      iMovie = 408981434;
+      Ivory = 6444602274;
+      Keynote = 409183694;
+      Kindle = 302584613;
+      NextDNS = 1464122853;
+      Numbers = 409203825;
+      Pages = 409201541;
+      Reeder = 1449412482;
+      TestFlight = 899247664;
+      Xcode = 497799835;
+    };
+  };
+}
diff --git a/justfile b/justfile
index 29cd659..1929bdb 100644
--- a/justfile
+++ b/justfile
@@ -30,15 +30,21 @@ _switch: _build
 # switch to latest home-manager generation
 switch: (_run "_switch")
 
-_update: && _switch
+_update: && _switch _brew-update
     nix flake update --commit-lock-file "{{ root_dir }}"
     $NIXPKGS_PATH/pkgs/applications/editors/vscode/extensions/update_installed_exts.sh > \
         {{ root_dir }}/programs/vscode/extensions.nix
 
+_brew-update:
+    brew update
+    brew upgrade
+    mas upgrade
+
 # update packages and switch
 update: (_run "_update")
 
 # clean up nix garbage
 clean:
     home-manager expire-generations "-7 days"
-    nix-collect-garbage -d --delete-old
+    sudo nix-collect-garbage -d --delete-older-than 7d
+    brew cleanup  --prune 7
diff --git a/programs/fish.nix b/programs/fish.nix
index cb9a115..4b710ce 100644
--- a/programs/fish.nix
+++ b/programs/fish.nix
@@ -1,4 +1,4 @@
-{ inputs, config, pkgs, ... }:
+{ inputs, config, osConfig, pkgs, ... }:
 
 let username = config.home.username;
 in {
@@ -25,6 +25,14 @@ in {
     interactiveShellInit = ''
       fzf_configure_bindings --git_status=\cs --history=\cr --variables=\cv --directory=\cf --git_log=\cg
       neofetch
+
+      if test -d (brew --prefix)"/share/fish/completions"
+        set -p fish_complete_path (brew --prefix)/share/fish/completions
+      end
+
+      if test -d (brew --prefix)"/share/fish/vendor_completions.d"
+        set -p fish_complete_path (brew --prefix)/share/fish/vendor_completions.d
+      end
     '';
 
     shellInit = ''
@@ -32,6 +40,7 @@ in {
       fenv source /nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh
       fenv source /etc/profiles/per-user/${username}/etc/profile.d/hm-session-vars.sh
       fish_add_path -m ~/.local/bin ~/.cabal/bin /etc/profiles/per-user/${username}/bin
+      eval "$(${osConfig.homebrew.brewPrefix}/brew shellenv)"
     '';
   };
 }