Any chance you could make a flake.nix for this repo

[nixinator]

Great that you provide an overlay, but can you create a flake for this package, with sydtest as an attribute inside packages in the flake.nix.

[NorfairKing]

@nixinator I don't use flakes because they're an experimental feature that I don't want to depend on until they're stable. I'm not opposed to supporting this workflow but I cannot do it myself.

Where does this wish come from? Is it you personally, your employer (if so, which one)?

[MatthewCroughan]

@NorfairKing I wish to import your code in a Flake. I cannot do this, because your Nix code uses builtins.currentSystem which is considered impure since it refers to the host system (which can vary). If I attempt to import any of your Nix code in a Flake, it results in:

error: attribute 'currentSystem' missing

       at /nix/store/2ighdnh07y10my6466cm6rxv629dgyr9-nixpkgs-src/pkgs/top-level/impure.nix:18:43:

           17|   # (build, in GNU Autotools parlance) platform.
           18|   localSystem ? { system = args.system or builtins.currentSystem; }
             |                                           ^
           19|
(use '--show-trace' to show detailed location information)

This is not something I can fix, since your imports ultimately call more impure things. I tried the following for example. where sydtest-src is your source code:

...
          sydtestPurified = pkgs.runCommandNoCC "sydtestPurified" {} ''
            cp -r ${sydtest-src} $TMP/src
            cd $TMP/src
            for f in $(find . -type f); do
              substituteInPlace $f \
                --replace 'builtins.currentSystem' '"${system}"' \
                --replace 'inherit system' 'system = "${system}"'
            done
            cp -r $TMP/src $out
          '';
...

But import sydtestPurified still results in error: attribute 'currentSystem' missing.

Related issue: https://github.com/NixOS/nix/issues/3843

[NorfairKing]

@MatthewCroughan Thanks for the details! I think I understand what flakes are and why you need me to provide one if you want to use it.

What I am asking right now is: Where is this ask coming from. Is it a person, is it an organisation. Which project is sydtest used for in this case?

[NorfairKing]

To answer your question: I cannot justify spending the time to set up and maintain a flake setup right now but that may be fixable.

[MatthewCroughan]

In the case that you want a low maintenance approach and want to continue with niv, this might be useful to you. https://github.com/crazazy/niv-flakes

[NorfairKing]

Seems to be fixed in #20