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| -rw-r--r-- | doc/guix.texi | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/doc/guix.texi b/doc/guix.texi index 64b18b4416..43e7935b4c 100644 --- a/doc/guix.texi +++ b/doc/guix.texi @@ -455,10 +455,18 @@ scripts, etc. This direct correspondence allows users to make sure a given package installation matches the current state of their distribution, and helps maximize @dfn{reproducibility}. +@cindex substitute This foundation allows Guix to support @dfn{transparent binary/source deployment}. When a pre-built binary for a @file{/nix/store} path is -available from an external source, Guix just downloads it; otherwise, it -builds the package from source, locally. +available from an external source---a @dfn{substitute}, Guix just +downloads it@footnote{@c XXX: Remove me when outdated. +As of version @value{VERSION}, substitutes are downloaded from +@url{http://hydra.gnu.org/} but are @emph{not} authenticated---i.e., +Guix cannot tell whether binaries it downloaded have been tampered with, +nor whether they come from the genuine @code{gnu.org} build farm. This +will be fixed in future versions. In the meantime, concerned users can +opt for @code{--no-substitutes} (@pxref{Invoking guix-daemon}).}; +otherwise, it builds the package from source, locally. @node Invoking guix package @section Invoking @command{guix package} |