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authorLudovic Courtès <ludo@gnu.org>2015-03-24 22:47:25 +0100
committerLudovic Courtès <ludo@gnu.org>2015-03-24 23:22:23 +0100
commitc7d1d88f6c75f9ba67caa624976dbad2980856ef (patch)
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parentb655b2154c8a72f5c9b7e54594653df49f3c2c02 (diff)
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derivations: Don't invoke the substituter when an item is already in store.
Fixes <http://bugs.gnu.org/20188>. Reported by Mark H Weaver <mhw@netris.org>. * guix/derivations.scm (substitution-oracle): Add 'valid?' procedure. Remove 'valid?' items from PATHS.
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