error: Package ‘kcoreaddons-5.246.0’ in /nix/store/6mgi93p70j9mk0zkx5v6c92wnvai2gif-source/pkgs/kde/lib/mk-kde-derivation.nix:107 has an invalid meta attrset:
- key 'meta.license' has invalid value; expected (attribute set of anything) or string or list of ((attribute set of anything) or string), got