diff --git a/pkgs/development/tools/analysis/flow/default.nix b/pkgs/development/tools/analysis/flow/default.nix
index 618d87f8b0a..1913278368e 100644
--- a/pkgs/development/tools/analysis/flow/default.nix
+++ b/pkgs/development/tools/analysis/flow/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
     description = "A static type checker for JavaScript";
     homepage = http://flowtype.org;
     license = licenses.bsd3;
-    platforms = platforms.unix;
+    platforms = [ "x86_64-linux" "x86_64-darwin" ];
     maintainers = with maintainers; [ puffnfresh globin ];
   };
 }