This overlay fixes (suppresses the annoying message in) NixOS/nixpkgs#361825 and adds attributes for newer versions of J.

1. In the flake.nix for your project add in the “inputs” section:

   j-overlay = {
     url = "github:alexvorobiev/j-overlay";
     inputs.nixpkgs.follows = "nixpkgs"; # or not if you are ok with the
                                         # default (nixos-24.11 for now)
   }
   
       

2. Add the overlay to nixpkgs:

   pkgs = import nixpkgs {
     inherit system;
     overlays = [ j-overlay.overlays.default ];
   }
       

3. Now you have new packages corresponding to commits in https://github.com/jsoftware/jsource:
   • j962 (tag 9.6.2)
   • j963 (commit "version to 9.6.3")
   • j96 (alias for j963)
   • j970-beta3
   • j970-beta4
   • j97 (j970-beta4)
   • j (j96)

Ideas:

• NixOS/nixpkgs#97940
• NixOS/nixpkgs#106034
• https://github.com/leiserfg/leiserfg-overlay/tree/26fabb3a06a163cb3cc0e6de2f9c75d563920aa7/pkgs/j-with-addons