version=3

opts="uversionmangle=s{-beta}{~beta},filenamemangle=s{-beta}{~beta}"
  https://github.com/DerrickWood/kraken/releases .*/archive/v(\d[\d.beta-]+)\.(?:tar(?:\.gz|\.bz2)?|tgz)

## FIXME: Mangling does not work.  Here is an exampke from repmgr package.  Try this later.
## opts="uversionmangle=s/((?i)alpha|beta|rc)/~\L$1\E/,filenamemangle=s/(repmgr-.+?)((?i)alpha|beta|rc)/$1~\L$2\E/,pgpsigurlmangle=s/$/.asc/" \