fix helix donnot have fish completions

pkgs/helix.nix

@@ -4,15 +4,9 @@
   inputs,
   ...
 }:
-pkgs.runCommand "helix-wrapped"
-  {
-    buildInputs = [ pkgs.makeWrapper ];
-  }
-  ''
-    mkdir -p $out/bin
-    makeWrapper "${lib.getExe inputs.helix.packages."${pkgs.system}".default}" $out/bin/hx \
-    --suffix PATH : ${
-      lib.makeBinPath (
+let
+  helix = inputs.helix.packages."${pkgs.system}".default;
+  runtimeInputs = (
     with pkgs;
     [
       rustfmt
@@ -38,6 +32,17 @@ pkgs.runCommand "helix-wrapped"
       rust-analyzer
       nil
     ]
-      )
+  );
+in
+pkgs.symlinkJoin {
+  name = "helix-wrapped";
+  paths = [ helix ];
+  inherit (helix) meta;
+  buildInputs = [
+    pkgs.makeWrapper
+  ];
+  postBuild = ''
+    wrapProgram $out/bin/hx \
+    --suffix PATH : ${lib.makeBinPath runtimeInputs}
+  '';
 }
-  ''