egrep is obsolescent (during build on Fedora 40)

When I issue the following OAI build command on Fedora 40:

./build_oai -c -w USRP --nrUE --disable-T-Tracer --ninja --build-lib nrscope

I get the following messages:

egrep: warning: egrep is obsolescent; using grep -E
egrep: warning: egrep is obsolescent; using grep -E