Permission denied inside nix build?

When I build the following o = pkgs.runCommand "gdAddonsDir"{ paths = with pkgs.inputs; [ #all flake inputs gdBlenderShort gdSpritePreview gdGizmo3D gdAllTrack (pkgs.fetchzip { url = "https://github.com/Terapixel-Games/spacemouse-godot/releases/download/v0.1.0/spacemouse-godot-linux-template_release-x86_64.zip"; hash = "sha256-7YPPq6NeJl4Lg3WiNArXV5n5x82K/QiAmKWol3vk7b4="; }) (pkgs.fetchzip { url = "https://github.com/vaner...