GAP 4.8.9 installation with standard packages -- copy to your CoCalc project to get it
This is makeindex, version 2.15 [TeX Live 2015] (kpathsea + Thai support). Scanning input file HapMan.idx....done (558 entries accepted, 0 rejected). Sorting entries.......done (5784 comparisons). Generating output file HapMan.ind....done (567 lines written, 0 warnings). Output written in HapMan.ind. Transcript written in HapMan.ilg.