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-rwxr-xr-xscript/public-inbox-index2
1 files changed, 1 insertions, 1 deletions
diff --git a/script/public-inbox-index b/script/public-inbox-index
index db7ebbab..2a7a524b 100755
--- a/script/public-inbox-index
+++ b/script/public-inbox-index
@@ -101,7 +101,7 @@ sub index_dir {
                 eval { require PublicInbox::V2Writable };
                 die "v2 requirements not met: $@\n" if $@;
                 my $v2w = eval {
-                        local $ENV{NPROC} = $jobs if $jobs;
+                        $jobs and local $ENV{NPROC} = $jobs;
                         PublicInbox::V2Writable->new($repo);
                 };
                 if (defined $jobs) {