fix(modules/home-manager/rix101-shell): use HA configured shell packages

Author: reo101

modules/home-manager/rix101-shell/default.nix

@@ -137,7 +137,6 @@ in
     home.packages =
       with pkgs;
       lib.concatLists [
-        (lib.map (lib.flip builtins.getAttr pkgs) cfg.shells)
         (optionals cfg.starship [
           starship
         ])
@@ -262,7 +261,7 @@ in
       {
         SHELL =
           let
-            shellPackage = builtins.getAttr (builtins.head cfg.shells) pkgs;
+            shellPackage = config.programs.${builtins.head cfg.shells}.program;
           in
           "${shellPackage}/${shellPackage.shellPath}";
         MANPAGER = "nvim +Man!";