home: emacs: pin to emacs 28

Flake lock file changes:

• Updated input 'emacs-overlay':
    'github:nix-community/emacs-overlay/df5519990439ca5e65e72107d5ed83b846e53f6a' (2021-11-24)
  → 'github:nix-community/emacs-overlay/66cf86d29d3482e84d3a03f5c647abbdd03c34dc' (2021-11-26)

flake.lock

@@ -2,11 +2,11 @@
   "nodes": {
     "emacs-overlay": {
       "locked": {
-        "lastModified": 1637314118,
-        "narHash": "sha256-npGYpjp2Zc53p3adMQouTq+F+YI/X1aJiDL0DozzWOs=",
+        "lastModified": 1637947500,
+        "narHash": "sha256-UmzI/Y8ujqOd5uuicYfQdq7INyeACfQU9Qsotge5BHk=",
         "owner": "nix-community",
         "repo": "emacs-overlay",
-        "rev": "cc2cdfc1212057526f1f8f48b91cf58f49a1c3ae",
+        "rev": "66cf86d29d3482e84d3a03f5c647abbdd03c34dc",
         "type": "github"
       },
       "original": {
@@ -39,11 +39,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1637249535,
-        "narHash": "sha256-RCatEYQ+uqsZOZpN4ZOtSoO7CJTiQpHNdPjUA0jtejw=",
+        "lastModified": 1637721183,
+        "narHash": "sha256-4CAKKxrt9l0Hbl57Uypo7ol93Ko+5Yn+7xWWCMUyHQ8=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "2452979efe92128b03e3c27567267066c2825fab",
+        "rev": "df931a59a5864d6ff0c5d83598135816f8593647",
         "type": "github"
       },
       "original": {
@@ -71,11 +71,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1636976544,
-        "narHash": "sha256-9ZmdyoRz4Qu8bP5BKR1T10YbzcB9nvCeQjOEw2cRKR0=",
+        "lastModified": 1637595801,
+        "narHash": "sha256-LkIMwVFKCuEqidaUdg8uxwpESAXjsPo4oCz3eJ7RaRw=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "931ab058daa7e4cd539533963f95e2bb0dbd41e6",
+        "rev": "263ef4cc4146c9fab808085487438c625d4426a9",
         "type": "github"
       },
       "original": {
@@ -87,11 +87,11 @@
     },
     "nixpkgs-unstable-small": {
       "locked": {
-        "lastModified": 1637209424,
-        "narHash": "sha256-oXw75hkCOVtoB+CEElWiTmkC1gNdL3jf0tG2GInytHA=",
+        "lastModified": 1637737052,
+        "narHash": "sha256-6dXZrqIz4TSSHRHDuM3fyTEnF78A3lawM1kKamyRM/4=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "42d32516400c1d821d275a5460900bbaef3d3bf1",
+        "rev": "5dadb7717f34c2fb95bedc22cf279ef9eb095983",
         "type": "github"
       },
       "original": {

home/emacs.nix

@@ -27,7 +27,7 @@
 
     programs.emacs = {
       enable = true;
-      package = pkgs.emacsPgtkGcc;
+      package = pkgs.emacsGcc28;
     };
   };
 }