diff --git a/pkgs/applications/science/logic/symbiyosys/default.nix b/pkgs/applications/science/logic/symbiyosys/default.nix
index 53e1a90f5b6..3769b15f32a 100644
--- a/pkgs/applications/science/logic/symbiyosys/default.nix
+++ b/pkgs/applications/science/logic/symbiyosys/default.nix
@@ -2,13 +2,13 @@
 
 stdenv.mkDerivation rec {
   name = "symbiyosys-${version}";
-  version = "2017.11.05";
+  version = "2017.12.06";
 
   src = fetchFromGitHub {
     owner  = "cliffordwolf";
     repo   = "symbiyosys";
-    rev    = "db9c7e97b8f84ef7e9b18ae630009897c7982a08";
-    sha256 = "0pyznkjm0vjmaf6mpwknmh052qrwy2fzi05h80ysx1bxc51ns0m0";
+    rev    = "82f394260a74b07892d7f5bdec10ae0a8cad6caa";
+    sha256 = "0cniqxaf2m5xh7hqwcpdvwcxg7vqargzahbkzdfwafkdsqpb0ly3";
   };
 
   buildInputs = [ python3 yosys ];