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-rw-r--r--doc/guix.texi8
1 files changed, 8 insertions, 0 deletions
diff --git a/doc/guix.texi b/doc/guix.texi
index 97fddd025e..4b06b32232 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -600,6 +600,14 @@ user @file{nobody};
a writable @file{/tmp} directory.
@end itemize
+You can influence the directory where the daemon stores build trees
+@i{via} the @code{TMPDIR} environment variable. However, the build tree
+within the chroot is always @file{/tmp/nix-build-@var{name}.drv-0},
+where @var{name} is the derivation name---e.g., @code{coreutils-8.24}.
+This way, the value of @code{TMPDIR} does not leak inside build
+environments, which avoids discrepancies in cases where build processes
+capture the name of their build tree.
+
If you are installing Guix as an unprivileged user, it is still possible
to run @command{guix-daemon} provided you pass @code{--disable-chroot}.
However, build processes will not be isolated from one another, and not