Show the log tail when a build fails

If --no-build-output is given (which will become the default for the
"nix" command at least), show the last 10 lines of the build output if
the build fails.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/libmain/shared.cc b/src/libmain/shared.cc
index 0d9f9af73e16..0b6311516ad4 100644
--- a/src/libmain/shared.cc
+++ b/src/libmain/shared.cc
@@ -171,7 +171,7 @@ struct LegacyArgs : public MixCommonArgs
         : MixCommonArgs(programName), parseArg(parseArg)
     {
         mkFlag('Q', "no-build-output", "do not show build output",
-            &settings.buildVerbosity, lvlVomit);
+            &settings.verboseBuild, false);
 
         mkFlag('K', "keep-failed", "keep temporary directories of failed builds",
             &settings.keepFailed);