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-rw-r--r--doc/guix.texi15
1 files changed, 11 insertions, 4 deletions
diff --git a/doc/guix.texi b/doc/guix.texi
index fdd8fdf9ae..284d667f34 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -2582,7 +2582,8 @@ a derivation is the @code{derivation} procedure:
@var{args} [#:outputs '("out")] [#:hash #f] [#:hash-algo #f] @
[#:recursive? #f] [#:inputs '()] [#:env-vars '()] @
[#:system (%current-system)] [#:references-graphs #f] @
- [#:allowed-references #f] [#:leaked-env-vars #f] [#:local-build? #f]
+ [#:allowed-references #f] [#:leaked-env-vars #f] [#:local-build? #f] @
+ [#:substitutable? #t]
Build a derivation with the given arguments, and return the resulting
@code{<derivation>} object.
@@ -2612,6 +2613,11 @@ When @var{local-build?} is true, declare that the derivation is not a
good candidate for offloading and should rather be built locally
(@pxref{Daemon Offload Setup}). This is the case for small derivations
where the costs of data transfers would outweigh the benefits.
+
+When @var{substitutable?} is false, declare that substitutes of the
+derivation's output should not be used (@pxref{Substitutes}). This is
+useful, for instance, when building packages that capture details of the
+host CPU instruction set.
@end deffn
@noindent
@@ -2651,7 +2657,7 @@ is now deprecated in favor of the much nicer @code{gexp->derivation}.
[#:outputs '("out")] [#:hash #f] [#:hash-algo #f] @
[#:recursive? #f] [#:env-vars '()] [#:modules '()] @
[#:references-graphs #f] [#:allowed-references #f] @
- [#:local-build? #f] [#:guile-for-build #f]
+ [#:local-build? #f] [#:substitutable? #t] [#:guile-for-build #f]
Return a derivation that executes Scheme expression @var{exp} as a
builder for derivation @var{name}. @var{inputs} must be a list of
@code{(name drv-path sub-drv)} tuples; when @var{sub-drv} is omitted,
@@ -2674,7 +2680,8 @@ terminates by passing the result of @var{exp} to @code{exit}; thus, when
@code{%guile-for-build} fluid is used instead.
See the @code{derivation} procedure for the meaning of
-@var{references-graphs}, @var{allowed-references}, and @var{local-build?}.
+@var{references-graphs}, @var{allowed-references}, @var{local-build?},
+and @var{substitutable?}.
@end deffn
@noindent
@@ -3163,7 +3170,7 @@ information about monads.)
[#:module-path @var{%load-path}] @
[#:references-graphs #f] [#:allowed-references #f] @
[#:leaked-env-vars #f] @
- [#:local-build? #f] [#:guile-for-build #f]
+ [#:local-build? #f] [#:substitutable? #t] [#:guile-for-build #f]
Return a derivation @var{name} that runs @var{exp} (a gexp) with
@var{guile-for-build} (a derivation) on @var{system}. When @var{target}
is true, it is used as the cross-compilation target triplet for packages