diff --git a/pkgs/applications/altcoins/stellar-core.nix b/pkgs/applications/altcoins/stellar-core.nix
index b098ffdd1db..9942f0898a2 100644
--- a/pkgs/applications/altcoins/stellar-core.nix
+++ b/pkgs/applications/altcoins/stellar-core.nix
@@ -39,7 +39,7 @@ in stdenv.mkDerivation {
       store historical records of the ledger and participate in consensus.
     '';
     homepage = https://www.stellar.org/;
-    platforms = "x86_64-linux";
+    platforms = [ "x86_64-linux" ];
     maintainers = with maintainers; [ chris-martin ];
     license = licenses.asl20;
   };