diff --git a/pkgs/applications/altcoins/bitcoin.nix b/pkgs/applications/altcoins/bitcoin.nix
index b759b2dcb2cf..7be2b90551ec 100644
--- a/pkgs/applications/altcoins/bitcoin.nix
+++ b/pkgs/applications/altcoins/bitcoin.nix
@@ -10,9 +10,9 @@ stdenv.mkDerivation rec{
   version = core_version;
 
   src = fetchurl {
-    url = [ "https://bitcoin.org/bin/bitcoin-core-${core_version}/bitcoin-${version}.tar.gz"
-            "mirror://sourceforge/bitcoin/Bitcoin/bitcoin-${core_version}/bitcoin-${version}.tar.gz"
-          ];
+    urls = [ "https://bitcoin.org/bin/bitcoin-core-${core_version}/bitcoin-${version}.tar.gz"
+             "mirror://sourceforge/bitcoin/Bitcoin/bitcoin-${core_version}/bitcoin-${version}.tar.gz"
+           ];
     sha256 = "cddf96c71d0a35524fde93380981cf0cf0b51441454a3a68b9be491b9239bfec";
   };