@jamatos From what I can tell, there's no build for F33 yet, so one has to be built by the maintainer first:
fedpkg clone procps-ng cd procps-ng fedpkg switch-branch f33 fedpkg merge origin/master git push origin : fedpkg build
Only then can a buildroot override be made.
+1 Tested pgrep / pkill with very long command-lines and it works great! However, I did have to remove the igt-gpu-tools RPM from my system, since that declares a dependency on the older version (though I don't see why it can't be updated).
Installed both eclipse-m2e-core-1.8.0-1.fc26.noarch and maven-indexer-5.1.2-0.2.gite0570bf.fc26.noarch, restarted Eclipse, and everything works as expected.