diff --git a/pkgs/applications/audio/cantata/default.nix b/pkgs/applications/audio/cantata/default.nix
index f3cba4ca819..31d5240529f 100644
--- a/pkgs/applications/audio/cantata/default.nix
+++ b/pkgs/applications/audio/cantata/default.nix
@@ -69,6 +69,7 @@ stdenv.mkDerivation rec {
     ++ stdenv.lib.optional (withTaglib && !withKDE4 && withDevices) udisks2;
 
   unpackPhase = "tar -xvf $src";
+  sourceRoot = "cantata-1.3.4";
 
   # Qt4 is implicit when KDE is switched off.
   cmakeFlags = stdenv.lib.flatten [