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Homebrew has a formula for moreutils and GNU parallel.

GNU Parallel conflicts with Moreutils since it also has a binary called parallel, which is just less useful. However I'd still like to install both formulae at the same time. How can I do that?

Ideally, I'd install GNU Parallel as gparallel – akin to the naming of the Coreutils binaries – to avoid these conflicts, but I don't see a way to specify that in the formula itself, since prefix is just the Homebrew prefix.

def install                                                                                                                               
    system "./configure", "--prefix=#{prefix}"                                                                                              
    system "make install"                                                                                                                   

Any way to get the best of both worlds?

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Are you aware that certain features of GNU Parallel depends on the program being called parallel? – Ole Tange Feb 3 '13 at 19:17
No, I wasn't. Could you explain what these are? (Also, why is there a configuration option that lets you change this so easily?) – slhck Feb 3 '13 at 19:21
brew install moreutils --without-parallel
brew install parallel
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brew still complained Error: Cannot install parallel because conflicting formulae are installed. The second command should be brew install parallel --force. – Frozen Flame Sep 17 '15 at 3:52
up vote 3 down vote accepted

You can edit the GNU Parallel formula like so:

brew edit parallel

Now, change the following line:

system "./configure", "--prefix=#{prefix}"

To the following:

system "./configure", "--prefix=#{prefix}", "--program-prefix=g"

Save and now force-install Parallel (uninstall it if you haven't already—you don't need to touch the Moreutils installation for this to work):

brew install parallel --force

Now, GNU Parallel will be installed as gparallel.

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And IMO this should be the default alternative if Moreutils is installed, like they do with Coreutils. Note to self: Nag the Homebrew people to change this. – slhck Feb 3 '13 at 10:38

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