diff --git a/pkgs/data/icons/numix-icon-theme/default.nix b/pkgs/data/icons/numix-icon-theme/default.nix
index 6b6b77ae5e8b..35f624a00f5b 100644
--- a/pkgs/data/icons/numix-icon-theme/default.nix
+++ b/pkgs/data/icons/numix-icon-theme/default.nix
@@ -3,13 +3,13 @@
 stdenv.mkDerivation rec {
   name = "${pname}-${version}";
   pname = "numix-icon-theme";
-  version = "17-12-25";
+  version = "18.07.17";
 
   src = fetchFromGitHub {
     owner = "numixproject";
     repo = pname;
     rev = version;
-    sha256 = "0q3hpq2jc9iwnzzqpb12g1qzjsw4ckhdqkfqf6nirl87r5drkv6j";
+    sha256 = "0clh55kmhc52d33dfm2c6h3lg6ddfh8a088ir9lv1camn9kj55bd";
   };
 
   nativeBuildInputs = [ gtk3 hicolor-icon-theme ];
@@ -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 ];
   };
 }