diff --git a/pkgs/applications/audio/hydrogen/default.nix b/pkgs/applications/audio/hydrogen/default.nix
index 6b994c7d9ae..bb10f24b90a 100644
--- a/pkgs/applications/audio/hydrogen/default.nix
+++ b/pkgs/applications/audio/hydrogen/default.nix
@@ -20,7 +20,8 @@ stdenv.mkDerivation rec {
   postPatch = ''
     sed -e 's#/usr/lib/ladspa#${ladspaPlugins}/lib/ladspa#' -i libs/hydrogen/src/preferences.cpp
     sed '/\/usr/d' -i libs/hydrogen/src/preferences.cpp
-    '';
+    sed "s#pkg_ver.rstrip().split('.')#pkg_ver.rstrip().split('.')[:3]#" -i Sconstruct
+  '';
 
   # why doesn't scons find librdf?
   buildPhase = ''