download-from-binary-cache.pl: Get rid of an uninitialized value warning

Reported by Pablo Costa.

1 files changed, 1 insertions, 1 deletions

diff --git a/scripts/download-from-binary-cache.pl.in b/scripts/download-from-binary-cache.pl.in
index a511f65b4348..4ca494497edc 100644
--- a/scripts/download-from-binary-cache.pl.in
+++ b/scripts/download-from-binary-cache.pl.in
@@ -225,7 +225,7 @@ sub getAvailableCaches {
         }
     }
 
-    my @untrustedUrls = strToList $Nix::Config::config{"untrusted-extra-binary-caches"};
+    my @untrustedUrls = strToList $Nix::Config::config{"untrusted-extra-binary-caches"} // "";
     foreach my $url (@untrustedUrls) {
         next unless scalar(grep { $url eq $_ } @trustedUrls) > 0;
         push @urls, $url;