Sandboxless VSCodium

Wrong wiki. Use https://wiki.nixos.org/wiki/Visual_Studio_Code#Use_VS_Code_extensions_without_additional_configuration which mentions

Note: :open_book:buildFHSEnv allows for ease-of-use at the cost of impurity, non-reproducibility, and denied root access (you cannot use sudo in .fhs packages, also see [1])

Though even that note can be improved, because I have no idea what “ease of use” means here.