diff --git a/pkgs/os-specific/darwin/xcode/default.nix b/pkgs/os-specific/darwin/xcode/default.nix
index be9162fd7b65..34e3b2dfeeae 100644
--- a/pkgs/os-specific/darwin/xcode/default.nix
+++ b/pkgs/os-specific/darwin/xcode/default.nix
@@ -54,5 +54,5 @@ in lib.makeExtensible (self: {
   xcode_10_3 = requireXcode "10.3" "1i628vfn6zad81fsz3zpc6z15chhskvyp8qnajp2wnpzvrwl6ngb";
   xcode_11 = requireXcode "11" "1r03j3kkp4blfp2kqpn538w3dx57ms930fj8apjkq6dk7fv3jcqh";
   xcode_11_3_1 = requireXcode "11.3.1" "1p6nicj91kr6ad3rmycahd1i7z4hj7ccjs93ixsiximjzaahx3q4";
-  xcode = self."xcode_${lib.replaceStrings ["."] ["_"] (if stdenv.targetPlatform.useiOSPrebuilt then stdenv.targetPlatform.xcodeVer else "10.3")}";
+  xcode = self."xcode_${lib.replaceStrings ["."] ["_"] (if (stdenv.targetPlatform ? xcodeVer) then stdenv.targetPlatform.xcodeVer else "11.3.1")}";
 })