diff --git a/pkgs/data/icons/numix-icon-theme/default.nix b/pkgs/data/icons/numix-icon-theme/default.nix
index fcff9a451a71..35f624a00f5b 100644
--- a/pkgs/data/icons/numix-icon-theme/default.nix
+++ b/pkgs/data/icons/numix-icon-theme/default.nix
@@ -29,7 +29,8 @@ stdenv.mkDerivation rec {
     description = "Numix icon theme";
     homepage = https://numixproject.org;
     license = licenses.gpl3;
-    platforms = platforms.all;
+    # darwin cannot deal with file names differing only in case
+    platforms = platforms.linux;
     maintainers = with maintainers; [ romildo jgeerds ];
   };
 }