Fix kakoune failing to compile

... and move its definition into overlay

home/kakoune/kak.nix

@@ -1,36 +1,6 @@
 { config, pkgs, lib, ... }:
 
 let
-  kakounePkg =
-    pkgs.kakoune.override {
-      kakoune = with lib; pkgs.stdenv.mkDerivation rec {
-        pname = "kakoune-unwrapped";
-        version = "r${builtins.substring 0 6 pkgs.sources.kakoune.rev}";
-        src = pkgs.sources.kakoune;
-        makeFlags = [ "debug=no" "PREFIX=${placeholder "out"}" ];
-
-        preConfigure = ''
-          export version="v${version}";
-        '';
-
-        enableParallelBuilding = true;
-
-        doInstallCheck = true;
-        installCheckPhase = ''
-          $out/bin/kak -ui json -e "kill 0"
-        '';
-
-        postInstall = ''
-          # make share/kak/autoload a directory
-          cd "$out/share/kak"
-          autoload_target=$(readlink autoload)
-          rm autoload
-          mkdir autoload
-          ln -s --relative "$autoload_target" autoload
-        '';
-      };
-    };
-
   kak-lsp = pkgs.libs.crane.buildPackage {
     src = pkgs.sources.kak-lsp;
     buildInputs = (with pkgs;
@@ -201,7 +171,7 @@ in
       };
   };
 
-  programs.my-kakoune.package = kakounePkg;
+  programs.my-kakoune.package = pkgs.kakoune;
   programs.my-kakoune.rc =
     builtins.readFile ./kakrc + ''
 

overlay.nix

@@ -54,6 +54,21 @@ let
     });
 
     input-remapper = final.unstable.input-remapper;
+
+    kakoune-unwrapped =
+      prev.kakoune-unwrapped.overrideAttrs (attrs: {
+        version = "r${builtins.substring 0 6 inputs.kakoune.rev}";
+        src = inputs.kakoune;
+        patches = [
+          # patches in the original package was already applied
+
+          # https://github.com/mawww/kakoune/pull/5108
+          (final.fetchpatch {
+            url = "https://github.com/mawww/kakoune/commit/64b3433905eeb33653ed617d61906ba68c686916.patch";
+            hash = "sha256-XYA4GcOEuWHsnDhMI0nXbg9Myv2o1UZ8qvzavIXbkJo=";
+          })
+        ];
+      });
   };
 
   overlay-libs = final: prev: {