home-manager/profiles/nix.nix

   1 { pkgs, lib, config, nixosConfig, ... }:
   2 {
   3   programs.home-manager.enable = true;
   4   home.packages = [
   5     pkgs.home-manager
   6     pkgs.nix-du
   7   ] ++ pkgs.lib.optionals pkgs.stdenv.hostPlatform.isx86_64 [
   8     pkgs.nix-tree
   9   ];
  10   # Keep only the last generation of the home-manager profile
  11   home.activation.delete-generations = lib.hm.dag.entryAfter [ "writeBoundary" ] ''
  12     if [ "$(${pkgs.coreutils}/bin/id -u)" = 0 ]
  13     then profile="''${NIX_STATE_DIR:-/nix/var/nix}/profiles/per-user/$USER"
  14     else profile="''${XDG_STATE_HOME:-$HOME/.local/state}"/nix/profiles
  15     fi
  16     ${pkgs.nix}/bin/nix-env --delete-generations +1 --profile "$profile"/home-manager
  17   '';
  18 }