GC Warning: Failed to expand heap by 4194304 KiB

error:

       … while evaluating attribute 'drv'

         at /nix/store/my18zap6nbgxkq5cljnj5pj2c0flpqr6-filnix-experiment-0.12.0/lib/experiment/planner.nix:14:3:

           13| {

           14|   drv = p.drvPath;

             |   ^

           15|   name = p.name;

       … while evaluating the attribute 'drvPath'

         at /nix/store/a4q1f2w96j1y9plcyd44xc02kv6dvvhb-source/lib/customisation.nix:418:7:

          417|     // {

          418|       drvPath =

             |       ^

          419|         assert condition;

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

       error: Package ‘gtk+3-3.24.49’ in /nix/store/a4q1f2w96j1y9plcyd44xc02kv6dvvhb-source/pkgs/development/libraries/gtk/3.x.nix:261 is marked as broken, refusing to evaluate.

       a) To temporarily allow broken packages, you can use an environment variable

          for a single invocation of the nix tools.

            $ export NIXPKGS_ALLOW_BROKEN=1

          Note: When using `nix shell`, `nix build`, `nix develop`, etc with a flake,

                then pass `--impure` in order to allow use of environment variables.

       b) For `nixos-rebuild` you can set

         { nixpkgs.config.allowBroken = true; }

       in configuration.nix to override this.

       c) For `nix-env`, `nix-build`, `nix-shell` or any other Nix command you can add

         { allowBroken = true; }

       to ~/.config/nixpkgs/config.nix.