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-rw-r--r--doc/manual/nix-env.xml2
-rw-r--r--doc/manual/nix-store.xml2
-rw-r--r--doc/manual/opt-verbose.xml14
3 files changed, 18 insertions, 0 deletions
diff --git a/doc/manual/nix-env.xml b/doc/manual/nix-env.xml
index 702faa621..c73716381 100644
--- a/doc/manual/nix-env.xml
+++ b/doc/manual/nix-env.xml
@@ -9,6 +9,8 @@
<command>nix-env</command>
<arg rep='repeat'><option>--verbose</option></arg>
<arg rep='repeat'><option>-v</option></arg>
+ <arg><option>--build-output</option></arg>
+ <arg><option>-B</option></arg>
<arg><option>--keep-failed</option></arg>
<arg><option>-K</option></arg>
<arg>
diff --git a/doc/manual/nix-store.xml b/doc/manual/nix-store.xml
index 479c1c3b0..8c6bcfe37 100644
--- a/doc/manual/nix-store.xml
+++ b/doc/manual/nix-store.xml
@@ -9,6 +9,8 @@
<command>nix-store</command>
<arg rep='repeat'><option>--verbose</option></arg>
<arg rep='repeat'><option>-v</option></arg>
+ <arg><option>--build-output</option></arg>
+ <arg><option>-B</option></arg>
<arg><option>--keep-failed</option></arg>
<arg><option>-K</option></arg>
<arg choice='plain'><replaceable>operation</replaceable></arg>
diff --git a/doc/manual/opt-verbose.xml b/doc/manual/opt-verbose.xml
index 3868acf30..53fe07ae7 100644
--- a/doc/manual/opt-verbose.xml
+++ b/doc/manual/opt-verbose.xml
@@ -71,3 +71,17 @@
</listitem>
</varlistentry>
+
+<varlistentry>
+ <term><option>--build-output</option> / <option>-B</option></term>
+ <listitem>
+ <para>
+ Causes the output written by build actions to standard output
+ and standard error to be echoed to standard error, regardless of
+ verbosity level. By default, it is only echoed at a verbosity
+ level of at least 4 (<quote>Debug</quote>), and is suppressed at
+ lower levels. Note that it is always written to a log file in
+ <filename><replaceable>prefix</replaceable>/nix/var/log/nix</filename>.
+ </para>
+ </listitem>
+</varlistentry>