openssl gendh during make install

HI! I have to admit that I find the openssl gendh during make install not ideal. The reason is that most .spec files use make install to create files in a build root during package build. And therefore at least it wastes a lot of CPU cycles during the build process for generating a file which the admin should re-generate *after* installing the package anyway. Any possible solution for this? E.g. I'd prefer start scripts to invoke openssl gendh if the file does not exist yet. Ciao, Michael.