From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andreas Enge <andreas@enge.fr>
Subject: bug#28310: guix build -n misses package builds
Date: Thu, 31 Aug 2017 21:03:34 +0200
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To: 28310@debbugs.gnu.org

Hello,

I am right now in the process of updating pari-gp to version 2.9.3.
After building it on a git check-out of three days ago, which went smoothly,
I rebased my patch on today's master and was pleased to see that no rebuild
was needed:

$ ./pre-inst-env guix build pari-gp -n
outputs nothing.

However, once the -n dropped, the gd package gets built.
And then it is starting ruby, which has no connection to pari-gp:
Downloading https://mirror.hydra.gnu.org/guix/nar/229n3pzp5bdmbdvwslg0dxliysas92k5-ruby-2.4.1.tar.xz...
   ruby-2.4.1.tar.xz  9.5MiB                                                                                                       22KiB/s 00:06 [                    ]   1.3%^

Andreas