branch master updated (b655b21 -> c7d1d88)

[Ludovic Courtès]

civodul pushed a change to branch master
in repository guix.

      from  b655b21   gnu: calibre: Add a patch to avoid automatic checking for 
updates.
       new  c7d1d88   derivations: Don't invoke the substituter when an item is 
already in store.

The 1 revisions listed above as "new" are entirely new to this
repository and will be described in separate emails.  The revisions
listed as "adds" were already present in the repository and have only
been added to this reference.


Summary of changes:
 guix/derivations.scm |   20 +++++++++++++-------
 1 files changed, 13 insertions(+), 7 deletions(-)