Overwrite emacs package with newer agent shell version

flakes/emacs/home.nix

@@ -1,4 +1,4 @@
-{ pkgs, ... }:
+{ pkgs, lib, ... }:
 {
   home.file.".emacs.d/early-init.el".source = ./config/early-init.el;
   home.file.".emacs.d/tree-sitter/libtree-sitter-swift.dylib".source = ./config/tree-sitter/libtree-sitter-swift.dylib;
@@ -8,7 +8,44 @@
     enable = true;
     extraConfig = builtins.readFile ./config/init.el +
       builtins.readFile ./config/lisp/utils.el;
-    extraPackages = epkgs: (with epkgs; [
+    extraPackages = epkgs:
+      let
+        myEpkgs = epkgs.overrideScope (final: prev: {
+          shell-maker = prev.shell-maker.overrideAttrs (_: {
+            version = "0.90.1";
+            src = pkgs.fetchFromGitHub {
+              owner = "xenodium";
+              repo = "shell-maker";
+              rev = "55f829d179608a3c4b11e86427713d5be7c4bb58";
+              hash = "sha256-tFzyVXxgrR6LOPUhX4MgJNLy3PX+pwprjdYi+IZXr+E=";
+            };
+          });
+
+          agent-shell = final.melpaBuild {
+            pname = "agent-shell";
+            ename = "agent-shell";
+            version = "0.47.3";
+
+            src = pkgs.fetchFromGitHub {
+              owner = "xenodium";
+              repo = "agent-shell";
+              rev = "v0.50.1";
+              hash = "sha256-y3WKd7w9zNebNlP3phMLmMbrFd+MHqwwJH/dUP6VSlo=";
+            };
+
+            packageRequires = with final; [
+              acp
+              shell-maker
+            ];
+
+            meta = {
+              homepage = "https://github.com/xenodium/agent-shell";
+              description = "Native agentic integrations for Claude Code, Gemini CLI, etc";
+            };
+          };
+        });
+      in
+      with myEpkgs; [
         agent-shell
         apheleia
         avy
@@ -28,6 +65,7 @@
         flycheck
         flycheck-clj-kondo
         flycheck-swiftlint
+        flymake-collection
         graphql-mode
         helpful
         htmlize
@@ -73,6 +111,6 @@
         vertico
         winpulse
         yasnippet
-    ]);
+      ];
   };
 }