common.nix: make fish binaries high-priority

hosts/common.nix

@@ -3,17 +3,21 @@
 # since these also get installed to server,
 # which should have a small attack surface.
 {
+  lib,
   self,
   pkgs,
   ...
 }: let
+  inherit (lib.meta) hiPrioSet;
   inherit (self.packages.${pkgs.stdenv.system}) wrapped-helix fish;
 in {
-  environment.systemPackages = builtins.attrValues {
+  environment.systemPackages =
+    builtins.attrValues {
       inherit
         (pkgs)
         cachix
         calc
+        delta
         difftastic
         eza
         gcc
@@ -34,13 +38,16 @@ in {
         television
         trash-cli
         util-linux
+        uutils-coreutils-noprefix
         w3m
         wireguard-tools
         zip
         zoxide
         ;
+    }
+    ++ builtins.attrValues (hiPrioSet {
       inherit wrapped-helix fish;
-  };
+    });
   # helix as the only editor, a reasonable choice.
   environment.sessionVariables.EDITOR = "hx";
 }