There is no release (yet) at the given place, so somewhat wild-guessing.
@@ -1,5 +1,4 @@
- version=4
- opts="filenamemangle=s%(?:.*?)?v?(\d[\d.]*)\.tar\.gz%softflowd-$1.tar.gz%" \
- https://github.com/irono/softflowd/tags \
- (?:.*?/)?v?(\d[\d.]*)\.tar\.gz debian uupdate
+ version=3
+ https://github.com/irino/softflowd/releases \
+ /irino/softflowd/releases/download/[^/]+/softflowd-([0-9][.0-9]*)\.tar\.gz