homebrew doesn't recognize --devel flag I am trying to install octave following these instructions.

brew tap dpo/openblas
brew tap-pin dpo/openblas
brew install dpo/openblas/octave --HEAD --with-qt --with-java


The last line tells me

==&gt; Installing octave from dpo/openblas
Error: Option '--with-qt' requires '--DEVEL'.


So I try 

brew install --devel dpo/openblas/octave --HEAD --with-qt --with-java
brew install --DEVEL dpo/openblas/octave --HEAD --with-qt --with-java


And get the same error messages. How can I install with '--DEVEL'?
For anyone looking for the solution, it is described here.

brew install dpo/openblas/octave --with-qt --devel


--with-java gives a warning that legacy JDK6 is required, but there is apparently a fix for that here if you want to install it.