wp4nix: Use makeWrapper instead of patching

pkgs/development/tools/wp4nix/default.nix

@@ -1,4 +1,10 @@
-{ lib, buildGoModule, fetchFromGitLab, nix, subversion }:
+{ lib
+, buildGoModule
+, fetchFromGitLab
+, nix
+, subversion
+, makeWrapper
+}:
 
 buildGoModule rec {
   pname = "wp4nix";
@@ -14,9 +20,13 @@ buildGoModule rec {
 
   vendorSha256 = "sha256-pQpattmS9VmO3ZIQUFn66az8GSmB4IvYhTTCFn6SUmo=";
 
-  postPatch = ''
-    substituteInPlace main.go --replace nix-hash ${nix}/bin/nix-hash
-    substituteInPlace svn.go --replace '"svn"' '"${subversion}/bin/svn"'
+  nativeBuildInputs = [
+    makeWrapper
+  ];
+
+  postInstall = ''
+    wrapProgram $out/bin/wp4nix \
+      --prefix PATH : ${lib.makeBinPath [ nix subversion ]}
   '';
 
   meta = with lib; {