diff --git a/pkgs/development/compilers/yosys/default.nix b/pkgs/development/compilers/yosys/default.nix
index cdb23470ca99..617e6b862fb5 100644
--- a/pkgs/development/compilers/yosys/default.nix
+++ b/pkgs/development/compilers/yosys/default.nix
@@ -75,13 +75,13 @@ let
 
 in stdenv.mkDerivation (finalAttrs: {
   pname   = "yosys";
-  version = "0.46";
+  version = "0.47";
 
   src = fetchFromGitHub {
     owner = "YosysHQ";
     repo  = "yosys";
     rev   = "refs/tags/${finalAttrs.version}";
-    hash  = "sha256-OnSKsX5G8Tc6AMFCmuWg6AekJvvG+K5Zr5rZZll+c/o=";
+    hash  = "sha256-9u9aAPTZyt9vzZwryor3GRCGzs/mu2/XtM0XzV7uHfk=";
     fetchSubmodules = true;
     leaveDotGit = true;
     postFetch = ''
diff --git a/pkgs/development/compilers/yosys/plugins/synlig.nix b/pkgs/development/compilers/yosys/plugins/synlig.nix
index 0cfaac22122f..079c22aedbce 100644
--- a/pkgs/development/compilers/yosys/plugins/synlig.nix
+++ b/pkgs/development/compilers/yosys/plugins/synlig.nix
@@ -87,5 +87,6 @@ stdenv.mkDerivation (finalAttrs: {
     license     = licenses.asl20;
     maintainers = with maintainers; [ hzeller ];
     platforms   = platforms.all;
+    broken      = versionAtLeast yosys.version "0.47";
   };
 })