feat: Improve legacyPackage function

pkgs/cliphist'.nix

@@ -0,0 +1,44 @@
+{
+  srcs,
+  cliphist,
+  imagemagick,
+  wl-clipboard,
+  fuzzel,
+  gawk,
+  gnugrep,
+  lib,
+  makeWrapper,
+}:
+let
+  inherit (srcs.cliphist) src date version;
+in
+cliphist.overrideAttrs (
+  _final: prev: {
+    inherit src;
+    version =
+      if prev.version != "0.6.1" then
+        throw ''
+          Please remove <pkgs/cliphist.nix>
+        ''
+      else
+        "0-unstable-${date}-git${version}";
+    vendorHash = "sha256-4XyDLOJHdre/1BpjgFt/W6gOlPOvKztE+MsbwE3JAaQ=";
+    buildInputs = (prev.buildInputs or [ ]) ++ [
+      makeWrapper
+    ];
+    postInstall = ''
+      cp -t $out/bin/ $src/contrib/*
+      rm $out/bin/cliphist.service
+      wrapProgram $out/bin/cliphist-fuzzel-img \
+      --prefix PATH : ${
+        lib.makeBinPath [
+          imagemagick
+          wl-clipboard
+          fuzzel
+          gawk
+          gnugrep
+        ]
+      }
+    '';
+  }
+)