Comment # 7 on bug 1205043 from Arvin Schnell

So as I just found out there are three boost versions in Leap 15.4:
1.66 (boost), 1.71 (boost171) and 1.75 (boost.175).

AFAIU the newer two were just added as workarounds and should likely not
be normally installed on any system (esp. not on Leap, maybe on SLE).