nixpkgs/pkgs/development/compilers/fpc/default.upstream

url https://sourceforge.net/projects/freepascal/files/Source/
SF_version_dir
version_link 'fpcbuild-[0-9.]+[.]tar[.]gz/download$'
SF_redirect
version '.*-([0-9.]+)[.]tar[.]gz' '\1'
do_overwrite () { do_overwrite_just_version; }