Emacs >29 install attempts to install copilot-chat fail

[dickjones729]

When I try to install/configure copilot-chat from my init.el using use-package it doesn't work. Also, when looking at the package list I see that copilot-chat.el is incompatible for some reason. Wondering if anyone has an answer as to why it can't be installed? Thanks for any help.

[ncaq]

Please your put init.el url or body, if avalable.

[dickjones729]

The issue is on ubuntu 22.04, emacs 29.4.50

I simply put in the configuration from the README

(use-package copilot-chat)

also, when running package-list-packages, I see

copilot-chat               20260123.937   incompat    melpa      Copilot chat interface

I checked on another setup I have, ubuntu 24.04 and emacs 30.1.50, ther package-list-packages shows copilot-chat as 'normal'

copilot-chat               20260123.937   new    melpa      Copilot chat interface

Thanks

[ncaq]

Thank you for the report!

I investigated the root cause: the dependency mcp.el (lizqwerscott/mcp.el) requires Emacs 30.1, even though copilot-chat.el itself only declares (emacs "29.1") in its Package-Requires.

Specifically, mcp.el has:

;; Package-Requires: ((emacs "30.1") (jsonrpc "1.0.25"))

So the real minimum Emacs version for copilot-chat.el is currently 30.1, not 29.1. We should either update the declared requirement to (emacs "30.1") or make the MCP integration optional so it can still work on Emacs 29.x.

[dickjones729]

Ok, understood. Thanks so much for looking into it. Much appreciated.