I also miss this feature in apt-rdepends and asked around today on #debian-devel to see if there is an alternate solution. I was provided with the following shell function:
apt-rbdepends () { grep-dctrl -F Build-Depends "$1" -s Package /var/lib/apt/lists/*_Sources } I didn't see that this had been documented anywhere, and I figured that people might look here.
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