diff --git a/home/programs/fzf.nix b/home/programs/fzf.nix
index c8294d3..6248c19 100644
--- a/home/programs/fzf.nix
+++ b/home/programs/fzf.nix
@@ -1,4 +1,12 @@
 { lib, config, ... }:
+let
+  has-ripgrep = config.programs.ripgrep.enable;
+  has-fd = config.programs.fd.enable;
+  has-eza = config.programs.eza.enable;
+  has-bat = config.programs.bat.enable;
+  has-tmux = config.programs.tmux.enable;
+  has-delta = config.programs.git.delta.enable;
+in
 {
   programs.fzf = {
     enable = true;
@@ -15,23 +23,20 @@
       "--preview-window='border-sharp'"
     ];
 
-    # TODO: Check that rg is installed.
-    defaultCommand = "rg --files --hidden --glob \"!.git\"";
+    defaultCommand = lib.mkIf has-ripgrep "rg --files --hidden --glob \"!.git\"";
 
-    # TODO: Check that fd is installed.
-    changeDirWidgetCommand = "fd --type d";
-    changeDirWidgetOptions = lib.mkIf config.programs.eza.enable [
+    changeDirWidgetCommand = lib.mkIf has-fd "fd --type d";
+    changeDirWidgetOptions = lib.mkIf has-eza [
       "--preview 'eza --all --color=always --sort=name --group-directories-first --level=3 {}'"
     ];
 
-    # TODO: Check that fd is installed.
-    fileWidgetCommand = "fd --type f";
-    fileWidgetOptions = lib.mkIf config.programs.bat.enable [
+    fileWidgetCommand = lib.mkIf has-fd "fd --type f";
+    fileWidgetOptions = lib.mkIf has-bat [
       "--preview 'bat {}'"
     ];
 
-    tmux.enableShellIntegration = lib.mkIf config.programs.tmux.enable true;
+    tmux.enableShellIntegration = lib.mkIf has-tmux true;
   };
 
-  home.sessionVariables.fzf_diff_highlighter = "delta --paging=never --features=arctic-fox";
+  home.sessionVariables.fzf_diff_highlighter = lib.mkIf has-delta "delta --paging=never --features=arctic-fox";
 }