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-rw-r--r--scripts/download-from-binary-cache.pl.in2
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 317989e401df..305254b5d3b4 100644
--- a/scripts/download-from-binary-cache.pl.in
+++ b/scripts/download-from-binary-cache.pl.in
@@ -199,7 +199,7 @@ sub getAvailableCaches {
     # denotes options passed by the client.
     if (defined $Nix::Config::config{"untrusted-binary-caches"}) {
         my @untrustedUrls = strToList $Nix::Config::config{"untrusted-binary-caches"};
-        my @trustedUrls = (@urls, strToList($Nix::Config::config{"trusted-binary-caches"} // ""));
+        my @trustedUrls = Nix::Utils::uniq(@urls, strToList($Nix::Config::config{"trusted-binary-caches"} // ""));
         @urls = ();
         foreach my $url (@untrustedUrls) {
             die "binary cache ‘$url’ is not trusted (please add it to ‘trusted-binary-caches’ [@trustedUrls] in $Nix::Config::confDir/nix.conf)\n"