for a devshell of

        buildInputs = [
          agenix.packages.${system}.default
          pkgs.gptfdisk
          pkgs.sbctl
          pkgs.nix-output-monitor
          pkgs.nix-tree
        ];

In reply to @uep:matrix.org
yeah, I just switched to Will's branch and I'm rebuilding ghc (again) from direnv updating my devshell (because that has nom in it)