gitmux: fix build (#348998)

Author: drupol

pkgs/top-level/all-packages.nix

@@ -2364,7 +2364,7 @@ with pkgs;
 
   gitls = callPackage ../applications/version-management/gitls { };
 
-  gitmux = callPackage ../applications/version-management/gitmux { };
+  gitmux = callPackage ../applications/version-management/gitmux { buildGoModule = buildGo122Module; };
 
   gitnuro = callPackage ../applications/version-management/gitnuro { };