diff --git a/home/fish/fish.nix b/home/fish/fish.nix
index 837f18e..37a5f57 100644
--- a/home/fish/fish.nix
+++ b/home/fish/fish.nix
@@ -1,73 +1,87 @@
 { config, pkgs, ... }:
 
 {
-    programs.fish = {
-        enable = true;
-        package = pkgs.unstable.fish;
-        functions = {
-        };
+  imports = [
+    ./tide/nix-shell.nix
+  ];
 
-        shellAliases = {
-            cat = "bat --theme=GitHub ";
-            l = "exa -l --color=always ";
-            htop = "btm --color nord-light -b --tree";
-            Htop = "btm --color nord-light --tree";
+  programs.fish = {
+    enable = true;
+    package = pkgs.unstable.fish;
+    functions = { };
 
-            # My own commands for easy access
-            thisterm = "cd ~/Projects/uw/$CURRENT_TERM";
-            today = "date +%F";
-        };
-
-        interactiveShellInit = ''
-        set fish_greeting
-
-        # Set up an editor alias
-        if test -n "$EDITOR"
-            alias e="$EDITOR"
-        else
-            alias e="kak"
-        end
-
-        # Source iTerm2 integration
-        test -e ~/.iterm2_shell_integration.fish && source ~/.iterm2_shell_integration.fish
-
-        # Enable vi keybindings
-        fish_vi_key_bindings
-        ## Set some kak-focused keybindings
-        bind -M default gi beginning-of-line
-        bind -M default gl end-of-line
-        '';
-        plugins = [
-            {
-                name = "tide";
-                src = pkgs.fetchFromGitHub {
-                    owner = "IlanCosman";
-                    repo  = "tide";
-                    rev   = "3787c725f7f6a0253f59a2c0e9fde03202689c6c";
-                    sha256 = "00zsib1q21bgxffjlyxf5rgcyq3h1ixwznwvid9k6mkkmwixv9lj";
-                };
-            }
-            {
-                name = "fzf";
-                src = pkgs.fetchFromGitHub {
-                    owner = "jethrokuan";
-                    repo  = "fzf";
-                    rev   = "479fa67d7439b23095e01b64987ae79a91a4e283";
-                    sha256 = "0k6l21j192hrhy95092dm8029p52aakvzis7jiw48wnbckyidi6v";
-                };
-            }
-        ];
+    tide = {
+      nix-shell.enable = true;
     };
 
-    # Source files
-    home.file = {
-        "fish/change_cmd.fish" = {
-            source = ./. + "/change_cmd.fish";
-            target = ".config/fish/conf.d/change_cmd.fish";
-        };
-        "fish/pls.fish" = {
-            source = ./. + "/pls.fish";
-            target = ".config/fish/conf.d/pls.fish";
-        };
+    shellAliases = {
+      cat = "bat --theme=GitHub ";
+      l = "exa -l --color=always ";
+      htop = "btm --color nord-light -b --tree";
+      Htop = "btm --color nord-light --tree";
+
+      # My own commands for easy access
+      thisterm = "cd ~/Projects/uw/$CURRENT_TERM";
+      today = "date +%F";
     };
+
+    shellInit = ''
+      # Source brew integration
+      if test -e /opt/homebrew/bin/brew
+        /opt/homebrew/bin/brew shellenv | source
+      end
+    '';
+
+    interactiveShellInit = ''
+      set fish_greeting
+
+      # Set up an editor alias
+      if test -n "$EDITOR"
+          alias e="$EDITOR"
+      else
+          alias e="kak"
+      end
+
+      # Source iTerm2 integration
+      test -e ~/.iterm2_shell_integration.fish && source ~/.iterm2_shell_integration.fish
+
+      # Enable vi keybindings
+      fish_vi_key_bindings
+      ## Set some kak-focused keybindings
+      bind -M default gi beginning-of-line
+      bind -M default gl end-of-line
+    '';
+    plugins = [
+      {
+        name = "tide";
+        src = pkgs.fetchFromGitHub {
+          owner = "IlanCosman";
+          repo = "tide";
+          rev = "3787c725f7f6a0253f59a2c0e9fde03202689c6c";
+          sha256 = "00zsib1q21bgxffjlyxf5rgcyq3h1ixwznwvid9k6mkkmwixv9lj";
+        };
+      }
+      {
+        name = "fzf";
+        src = pkgs.fetchFromGitHub {
+          owner = "jethrokuan";
+          repo = "fzf";
+          rev = "479fa67d7439b23095e01b64987ae79a91a4e283";
+          sha256 = "0k6l21j192hrhy95092dm8029p52aakvzis7jiw48wnbckyidi6v";
+        };
+      }
+    ];
+  };
+
+  # Source files
+  home.file = {
+    "fish/change_cmd.fish" = {
+      source = ./. + "/change_cmd.fish";
+      target = ".config/fish/conf.d/change_cmd.fish";
+    };
+    "fish/pls.fish" = {
+      source = ./. + "/pls.fish";
+      target = ".config/fish/conf.d/pls.fish";
+    };
+  };
 }
diff --git a/home/fish/tide/nix-shell.nix b/home/fish/tide/nix-shell.nix
new file mode 100644
index 0000000..eeddd3d
--- /dev/null
+++ b/home/fish/tide/nix-shell.nix
@@ -0,0 +1,21 @@
+{ config, pkgs, lib, ... }:
+
+with lib;
+let
+  cfg = config.programs.fish.tide.nix-shell;
+in
+{
+  options.programs.fish.tide.nix-shell = {
+    enable = mkEnableOption "An indicator of having a `nix shell` environment";
+  };
+
+  config.programs.fish = mkIf cfg.enable {
+    functions._tide_item_nix_shell = ''
+      if string match -q "/nix/store/*" $PATH
+        set -U tide_nix_shell_color blue
+        set -U tide_nix_shell_bg_color normal
+        _tide_print_item nix_shell "❄"
+      end
+    '';
+  };
+}