If you are compiling v7.3.x under CentOS 8, you will need to first enable PowerTools, then install aspell-devel - otherwise aspell-devel will not be available to you:sudo dnf config-manager --set-enabled PowerToolssudo dnf install -y aspell-develThen in your configure line, just use:--with-pspellNOT--with-pspell=/some/dir