From 1dee45845ee835953b34ebb6e3723150ccc05fd2 Mon Sep 17 00:00:00 2001
From: Lin Jian <me@linj.tech>
Date: Sat, 21 Mar 2026 10:48:51 +0800
Subject: [PATCH] emacs: bump package-build to 4.0.0-unstable-2026-03-17

This fixes build failure of emacs.pkgs.lichess.  See also [1], [2] and
[3].

[1]: https://github.com/NixOS/nixpkgs/pull/494565
[2]: https://github.com/melpa/melpa/pull/9872
[3]: https://github.com/NixOS/nixpkgs/pull/502084
---
 pkgs/applications/editors/emacs/build-support/melpa.nix | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/pkgs/applications/editors/emacs/build-support/melpa.nix b/pkgs/applications/editors/emacs/build-support/melpa.nix
index 2e1d5d1cbc06..8f56ff55c9f7 100644
--- a/pkgs/applications/editors/emacs/build-support/melpa.nix
+++ b/pkgs/applications/editors/emacs/build-support/melpa.nix
@@ -20,12 +20,13 @@ let
   };
 
   packageBuild = stdenv.mkDerivation {
-    name = "package-build";
+    pname = "package-build";
+    version = "4.0.0-unstable-2026-03-17";
     src = fetchFromGitHub {
       owner = "melpa";
       repo = "package-build";
-      rev = "d1722503145facf96631ac118ec0213a73082b76";
-      hash = "sha256-utsZLm9IF9UkTwxFWvJmwA3Ox4tlMeNNTo+f/CqYJGA=";
+      rev = "c25ea902ac4fceb1eb998d46ac176a1de077439b";
+      hash = "sha256-JkdKCfMi+D2ls/Aiz9OPdtLSv1+938BRBJqsIYJIfBM=";
     };
 
     prePatch = ''