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doc: Use 'guix environment --no-grafts' to debug build failures. 

* doc/guix.texi (Debugging Build Failures): Pass --no-grafts to 'guix
environment' and explain.
master
Ludovic Courtès 2017-06-07 14:36:32 +02:00
parent 8a7304d609
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@ -5329,7 +5329,7 @@ a container similar to the one the build daemon creates:
$ guix build -K foo
@dots{}
$ cd /tmp/guix-build-foo.drv-0
$ guix environment -C foo --ad-hoc strace gdb
$ guix environment --no-grafts -C foo --ad-hoc strace gdb
[env]# source ./environment-variables
[env]# cd foo-1.2
@end example
@ -5337,7 +5337,10 @@ $ guix environment -C foo --ad-hoc strace gdb
Here, @command{guix environment -C} creates a container and spawns a new
shell in it (@pxref{Invoking guix environment}). The @command{--ad-hoc
strace gdb} part adds the @command{strace} and @command{gdb} commands to
the container, which would may find handy while debugging.
the container, which would may find handy while debugging. The
@option{--no-grafts} option makes sure we get the exact same
environment, with ungrafted packages (@pxref{Security Updates}, for more
info on grafts).
To get closer to a container like that used by the build daemon, we can
remove @file{/bin/sh}: