New troubles building simple standalone home-manager config

[raplonu]

Hey !

I'm trying to use home-manager with the default template on my ubuntu machine. I did the following:

nix flake init -t github:vic/den#default
nix flake update den

Then I uncommented this line:

den.homes.x86_64-linux.tux = { };

And finally ran:

home-manager switch --flake .#tux

which returned the following error:

error:
       … while calling the 'head' builtin
         at «https://releases.nixos.org/nixpkgs/nixpkgs-26.05pre948338.bcc4a9d9533c/nixexprs.tar.xz?narHash=sha256-V/p5M4cAMbu/MJBDn5YABy5QJgCFpsgrnXVVc2Uo5%2Bk%3D»/lib/attrsets.nix:1713:13:
         1712|           if length values == 1 || pred here (elemAt values 1) (head values) then
         1713|             head values
             |             ^
         1714|           else

       … while evaluating the attribute 'value'
         at «https://releases.nixos.org/nixpkgs/nixpkgs-26.05pre948338.bcc4a9d9533c/nixexprs.tar.xz?narHash=sha256-V/p5M4cAMbu/MJBDn5YABy5QJgCFpsgrnXVVc2Uo5%2Bk%3D»/lib/modules.nix:1160:7:
         1159|     // {
         1160|       value = addErrorContext "while evaluating the option `${showOption loc}':" value;
             |       ^
         1161|       inherit (res.defsFinal') highestPrio;

       … while evaluating the option `den.homes.x86_64-linux.tux.instantiate':

       (stack trace truncated; use '--show-trace' to show the full, detailed trace)

       error: expected a string but found null: null
       at «github:vic/den/6f2da36401ce851133e377a29712c0a7f382109c?narHash=sha256-RTNX98N2dLe/C51hqPQwutwKEI1WL7cyAPuKLMT86Bs%3D»/nix/lib/types.nix:169:44:
          168|         hostName = if nameWithHost then lib.last parts else null;
          169|         hostByName = den.hosts.${system}.${hostName} or null;
             |                                            ^
          170|         userByName = hostByName.users.${userName} or null;

Any idea of what I did wrong ?

Thanks in advance 🫰

[vic]

Hey, you did nothing wrong, all the contrary you found a bug.

fixed here, 7e18d2c

[raplonu]

That was quick 😮

Thanks a lot !