This patch provides input arguments `newuidmapPath` and `newgidmapPath` for apptainer and singularity to specify the path to the SUID-ed executables newuidmap and newgidmap where they are not available from the FHS PATH. As NixOS places those suided executables in a non-FHS position (/run/wrapper/bin), this patch provides programs.singularity.enableFakeroot option and implement with the above input parameters.